diff --git a/README.md b/README.md
index 74e1cc3..8749fad 100644
--- a/README.md
+++ b/README.md
@@ -114,4 +114,13 @@ Secret key encryption and signing/verifying uses Edwards curves 25519 algorithms
   - SHA3 256, 384, more are on the way.
 - CRC-protected binary ID with magic numbers to implement human-friendly IDS with type checks
 
+## Licensing
 
+# Licensing
+
+This is work in progress, not yet moved to public domain;
+you need to obtain a license from https://8-rays.dev or [Sergey Chernov]. For open source projects it will most be free on some special terms.
+
+It will be moved to open source; we also guarantee that it will be moved to open source immediately if the software export restrictions will be lifted. We do not support such practices here at 8-rays.dev and assume open source must be open.
+
+[Sergey Chernov]: https://t.me/real_sergeych
\ No newline at end of file
diff --git a/bin/pubdocs b/bin/pubdocs
index a2c5957..609bea3 100755
--- a/bin/pubdocs
+++ b/bin/pubdocs
@@ -1,4 +1,14 @@
 #!/bin/bash
+#
+# Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+#
+#  You may use, distribute and modify this code under the
+# terms of the private license, which you must obtain from the author
+#
+# To obtain the license, contact the author: https://t.me/real_sergeych or email to
+# real dot sergeych at gmail.
+#
+
 set -e
 ./gradlew dokkaHtml
 rsync -avz ./build/dokka/* code.sergeych.net:/bigstore/sergeych_pub/code/docs/crypto2
diff --git a/build.gradle.kts b/build.gradle.kts
index 3d784d7..8f094e1 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
 import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
diff --git a/gradle.properties b/gradle.properties
index 7fc6f1f..7a7674f 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1,11 @@
+#
+# Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+#
+#  You may use, distribute and modify this code under the
+# terms of the private license, which you must obtain from the author
+#
+# To obtain the license, contact the author: https://t.me/real_sergeych or email to
+# real dot sergeych at gmail.
+#
+
 kotlin.code.style=official
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 06febab..0e287ab 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,3 +1,13 @@
+#
+# Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+#
+#  You may use, distribute and modify this code under the
+# terms of the private license, which you must obtain from the author
+#
+# To obtain the license, contact the author: https://t.me/real_sergeych or email to
+# real dot sergeych at gmail.
+#
+
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-8.2-bin.zip
diff --git a/gradlew b/gradlew
index 1b6c787..1df0458 100755
--- a/gradlew
+++ b/gradlew
@@ -1,19 +1,13 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
 #
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
+#  You may use, distribute and modify this code under the
+# terms of the private license, which you must obtain from the author
 #
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
+# To obtain the license, contact the author: https://t.me/real_sergeych or email to
+# real dot sergeych at gmail.
 #
 
 ##############################################################################
diff --git a/settings.gradle.kts b/settings.gradle.kts
index ee4fb19..b15cbbe 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 pluginManagement {
     repositories {
         mavenCentral()
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Asymmetric.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Asymmetric.kt
index 5c85910..78ec9af 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Asymmetric.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Asymmetric.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.box.Box
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/BinaryId.kt b/src/commonMain/kotlin/net/sergeych/crypto2/BinaryId.kt
index 2333af6..3482020 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/BinaryId.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/BinaryId.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.util.encodeToUByteArray
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/ByteChunk.kt b/src/commonMain/kotlin/net/sergeych/crypto2/ByteChunk.kt
index 6fd01e0..b619b7a 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/ByteChunk.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/ByteChunk.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.Serializable
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt
index 7ae260c..ebbadc3 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Container.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.SerialName
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Contrail.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Contrail.kt
index db12b02..68e61d8 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Contrail.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Contrail.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import net.sergeych.bintools.CRC
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/DecryptingKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/DecryptingKey.kt
index 460ff45..fd6ecbf 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/DecryptingKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/DecryptingKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.util.decodeFromUByteArray
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/EncryptingKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/EncryptingKey.kt
index ee62e4b..d47bad1 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/EncryptingKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/EncryptingKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.util.encodeToUByteArray
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Hash.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Hash.kt
index 7b2f21b..18bdee9 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Hash.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Hash.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.generichash.GenericHash
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/InitCrypto.kt b/src/commonMain/kotlin/net/sergeych/crypto2/InitCrypto.kt
index 21199de..20b47c1 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/InitCrypto.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/InitCrypto.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.LibsodiumInitializer
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/KeyId.kt b/src/commonMain/kotlin/net/sergeych/crypto2/KeyId.kt
index 24ae071..8d543a8 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/KeyId.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/KeyId.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.Serializable
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/KeyInstance.kt b/src/commonMain/kotlin/net/sergeych/crypto2/KeyInstance.kt
index 8900c08..2c1d516 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/KeyInstance.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/KeyInstance.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 /**
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/MagickNumbers.kt b/src/commonMain/kotlin/net/sergeych/crypto2/MagickNumbers.kt
index 67388e5..f5d5941 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/MagickNumbers.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/MagickNumbers.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 enum class KeysmagicNumber(val label: String) {
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Multikey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Multikey.kt
index 65906c1..5e6ced5 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Multikey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Multikey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.SerialName
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/NonceBased.kt b/src/commonMain/kotlin/net/sergeych/crypto2/NonceBased.kt
index a41baf7..35f9a12 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/NonceBased.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/NonceBased.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 interface NonceBased {
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/NumericNonce.kt b/src/commonMain/kotlin/net/sergeych/crypto2/NumericNonce.kt
index caf45c6..d1d10c4 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/NumericNonce.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/NumericNonce.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 /**
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/PBKD.kt b/src/commonMain/kotlin/net/sergeych/crypto2/PBKD.kt
index 6b3a435..398ab42 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/PBKD.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/PBKD.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.util.encodeToUByteArray
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/PublicKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/PublicKey.kt
index d040741..13c6ca5 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/PublicKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/PublicKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.SerialName
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/SafeKeyExchange.kt b/src/commonMain/kotlin/net/sergeych/crypto2/SafeKeyExchange.kt
index a62d548..dc8ea73 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/SafeKeyExchange.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/SafeKeyExchange.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.keyexchange.KeyExchange
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/Seal.kt b/src/commonMain/kotlin/net/sergeych/crypto2/Seal.kt
index f650fd0..1c0b8b2 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/Seal.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/Seal.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.datetime.Instant
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/SealedBox.kt b/src/commonMain/kotlin/net/sergeych/crypto2/SealedBox.kt
index 4841fec..f04e95e 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/SealedBox.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/SealedBox.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.datetime.Instant
@@ -82,6 +92,7 @@ class SealedBox(
     /**
      * Unpack bipack-encoded payload
      */
+    @Suppress("unused")
     inline fun <reified T>unpack(): T = BipackDecoder.decode(message)
 
     init {
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/SecretKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/SecretKey.kt
index 96be114..a6e5ee1 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/SecretKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/SecretKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.box.Box
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/SigningKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/SigningKey.kt
index 117f28c..7b4e35f 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/SigningKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/SigningKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.datetime.Instant
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/SigningSecretKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/SigningSecretKey.kt
index 8ba1241..4f60f0c 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/SigningSecretKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/SigningSecretKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.signature.Signature
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/SymmetricKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/SymmetricKey.kt
index 7d5fc89..7c689de 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/SymmetricKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/SymmetricKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.secretbox.SecretBox
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalKey.kt
index dbf72cf..e66503f 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.Serializable
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPrivateKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPrivateKey.kt
index f8e9a66..b0c394b 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPrivateKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPrivateKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.SerialName
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPublicKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPublicKey.kt
index 2119356..44f3851 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPublicKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalPublicKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.SerialName
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalRing.kt b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalRing.kt
index a3c686d..9b76eeb 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/UniversalRing.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/UniversalRing.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.Serializable
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingKey.kt
index 2fbf483..bed9bf0 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 interface VerifyingKey: KeyInstance {
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingPublicKey.kt b/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingPublicKey.kt
index d2d0946..0f44578 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingPublicKey.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/VerifyingPublicKey.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.signature.InvalidSignatureException
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/WithFill.kt b/src/commonMain/kotlin/net/sergeych/crypto2/WithFill.kt
index 0f16ec1..b4a3bb2 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/WithFill.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/WithFill.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import kotlinx.serialization.Serializable
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/exceptions.kt b/src/commonMain/kotlin/net/sergeych/crypto2/exceptions.kt
index a114cea..9c0cd61 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/exceptions.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/exceptions.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 /**
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/kdf.kt b/src/commonMain/kotlin/net/sergeych/crypto2/kdf.kt
index 18e1a72..a99ea9c 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/kdf.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/kdf.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.crypto2
 
 import com.ionspin.kotlin.crypto.pwhash.*
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/tools.kt b/src/commonMain/kotlin/net/sergeych/crypto2/tools.kt
index 280a91f..928adf5 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/tools.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/tools.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 
 package net.sergeych.crypto2
diff --git a/src/commonMain/kotlin/net/sergeych/crypto2/utools.kt b/src/commonMain/kotlin/net/sergeych/crypto2/utools.kt
index f4b150d..14d0ef1 100644
--- a/src/commonMain/kotlin/net/sergeych/crypto2/utools.kt
+++ b/src/commonMain/kotlin/net/sergeych/crypto2/utools.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 
 package net.sergeych.crypto2
diff --git a/src/commonMain/kotlin/net/sergeych/tools/AtomicCounter.kt b/src/commonMain/kotlin/net/sergeych/tools/AtomicCounter.kt
index d124318..d8d042a 100644
--- a/src/commonMain/kotlin/net/sergeych/tools/AtomicCounter.kt
+++ b/src/commonMain/kotlin/net/sergeych/tools/AtomicCounter.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.tools
 
 @Suppress("unused")
diff --git a/src/commonMain/kotlin/net/sergeych/tools/AtomicValue.kt b/src/commonMain/kotlin/net/sergeych/tools/AtomicValue.kt
index 50d4f43..dd3969d 100644
--- a/src/commonMain/kotlin/net/sergeych/tools/AtomicValue.kt
+++ b/src/commonMain/kotlin/net/sergeych/tools/AtomicValue.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.tools
 
 import net.sergeych.synctools.ProtectedOp
@@ -5,7 +15,7 @@ import net.sergeych.synctools.invoke
 
 /**
  * Multiplatform (JS and battery included) atomically mutable value.
- * Actual value can be either changed in a block of [mutuate] when
+ * Actual value can be either changed in a block of [mutate] when
  * new value _depends on the current value_ or use a same [value]
  * property that is thread-safe where there are threads and just safe
  * otherwise ;)
diff --git a/src/commonMain/kotlin/net/sergeych/tools/flow_tools.kt b/src/commonMain/kotlin/net/sergeych/tools/flow_tools.kt
index 9f4aefc..eccc25f 100644
--- a/src/commonMain/kotlin/net/sergeych/tools/flow_tools.kt
+++ b/src/commonMain/kotlin/net/sergeych/tools/flow_tools.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 
 package net.sergeych.tools
diff --git a/src/commonMain/kotlin/net/sergeych/tools/pack_tools.kt b/src/commonMain/kotlin/net/sergeych/tools/pack_tools.kt
index d616ee9..b664a85 100644
--- a/src/commonMain/kotlin/net/sergeych/tools/pack_tools.kt
+++ b/src/commonMain/kotlin/net/sergeych/tools/pack_tools.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.tools
 
 import net.sergeych.bipack.BipackDecoder
diff --git a/src/commonMain/kotlin/net/sergeych/utools/collections.kt b/src/commonMain/kotlin/net/sergeych/utools/collections.kt
index d27dea5..2d23047 100644
--- a/src/commonMain/kotlin/net/sergeych/utools/collections.kt
+++ b/src/commonMain/kotlin/net/sergeych/utools/collections.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 
 package net.sergeych.utools
diff --git a/src/commonMain/kotlin/net/sergeych/utools/packing.kt b/src/commonMain/kotlin/net/sergeych/utools/packing.kt
index 7040e8e..f164f2a 100644
--- a/src/commonMain/kotlin/net/sergeych/utools/packing.kt
+++ b/src/commonMain/kotlin/net/sergeych/utools/packing.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package net.sergeych.utools
 
 import kotlinx.serialization.KSerializer
diff --git a/src/commonMain/kotlin/net/sergeych/utools/time.kt b/src/commonMain/kotlin/net/sergeych/utools/time.kt
index 6c0ae50..e4c4939 100644
--- a/src/commonMain/kotlin/net/sergeych/utools/time.kt
+++ b/src/commonMain/kotlin/net/sergeych/utools/time.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 
 package net.sergeych.utools
diff --git a/src/commonMain/kotlin/org/komputing/khash/keccak/Keccak.kt b/src/commonMain/kotlin/org/komputing/khash/keccak/Keccak.kt
index a15f822..ed476ec 100644
--- a/src/commonMain/kotlin/org/komputing/khash/keccak/Keccak.kt
+++ b/src/commonMain/kotlin/org/komputing/khash/keccak/Keccak.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package org.komputing.khash.keccak
 
 import com.ionspin.kotlin.bignum.integer.BigInteger
diff --git a/src/commonMain/kotlin/org/komputing/khash/keccak/KeccakParameter.kt b/src/commonMain/kotlin/org/komputing/khash/keccak/KeccakParameter.kt
index 57570e9..ba8bc53 100644
--- a/src/commonMain/kotlin/org/komputing/khash/keccak/KeccakParameter.kt
+++ b/src/commonMain/kotlin/org/komputing/khash/keccak/KeccakParameter.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 
 package org.komputing.khash.keccak
diff --git a/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/IntArrayExtensions.kt b/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/IntArrayExtensions.kt
index c36c21a..ca53baf 100644
--- a/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/IntArrayExtensions.kt
+++ b/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/IntArrayExtensions.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 package org.komputing.khash.keccak.extensions
 
 /**
diff --git a/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/PublicExtensions.kt b/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/PublicExtensions.kt
index d408301..94eb6da 100644
--- a/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/PublicExtensions.kt
+++ b/src/commonMain/kotlin/org/komputing/khash/keccak/extensions/PublicExtensions.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 @file:Suppress("unused")
 package org.komputing.khash.keccak.extensions
 
diff --git a/src/commonTest/kotlin/BinaryIdTest.kt b/src/commonTest/kotlin/BinaryIdTest.kt
index f6ec93a..e00f50a 100644
--- a/src/commonTest/kotlin/BinaryIdTest.kt
+++ b/src/commonTest/kotlin/BinaryIdTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlinx.coroutines.test.runTest
 import net.sergeych.bintools.toDump
 import net.sergeych.bipack.BipackEncoder
diff --git a/src/commonTest/kotlin/ContainerTest.kt b/src/commonTest/kotlin/ContainerTest.kt
index 572e1f4..e9ba1c5 100644
--- a/src/commonTest/kotlin/ContainerTest.kt
+++ b/src/commonTest/kotlin/ContainerTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import com.ionspin.kotlin.crypto.util.encodeToUByteArray
 import kotlinx.coroutines.test.runTest
 import kotlinx.serialization.encodeToString
diff --git a/src/commonTest/kotlin/HashTest.kt b/src/commonTest/kotlin/HashTest.kt
index 28a0528..93eba85 100644
--- a/src/commonTest/kotlin/HashTest.kt
+++ b/src/commonTest/kotlin/HashTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlinx.coroutines.flow.asFlow
 import kotlinx.coroutines.test.runTest
 import kotlinx.datetime.Clock
diff --git a/src/commonTest/kotlin/KDFTest.kt b/src/commonTest/kotlin/KDFTest.kt
index 4620930..5c55b5f 100644
--- a/src/commonTest/kotlin/KDFTest.kt
+++ b/src/commonTest/kotlin/KDFTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlinx.coroutines.test.runTest
 import net.sergeych.crypto2.KDF
 import net.sergeych.crypto2.initCrypto
diff --git a/src/commonTest/kotlin/KeysTest.kt b/src/commonTest/kotlin/KeysTest.kt
index eda80ab..242a9b1 100644
--- a/src/commonTest/kotlin/KeysTest.kt
+++ b/src/commonTest/kotlin/KeysTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import com.ionspin.kotlin.crypto.util.decodeFromUByteArray
 import com.ionspin.kotlin.crypto.util.encodeToUByteArray
 import kotlinx.coroutines.test.runTest
diff --git a/src/commonTest/kotlin/PBKDTest.kt b/src/commonTest/kotlin/PBKDTest.kt
index 9f10b39..98ca674 100644
--- a/src/commonTest/kotlin/PBKDTest.kt
+++ b/src/commonTest/kotlin/PBKDTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlinx.coroutines.test.runTest
 import net.sergeych.crypto2.PBKD
 import net.sergeych.crypto2.initCrypto
diff --git a/src/commonTest/kotlin/PackTest.kt b/src/commonTest/kotlin/PackTest.kt
index 6a774b4..8be7901 100644
--- a/src/commonTest/kotlin/PackTest.kt
+++ b/src/commonTest/kotlin/PackTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlinx.coroutines.test.runTest
 import kotlinx.datetime.Instant
 import net.sergeych.crypto2.initCrypto
diff --git a/src/commonTest/kotlin/RingTest.kt b/src/commonTest/kotlin/RingTest.kt
index ac010ed..017410c 100644
--- a/src/commonTest/kotlin/RingTest.kt
+++ b/src/commonTest/kotlin/RingTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import com.ionspin.kotlin.crypto.util.encodeToUByteArray
 import kotlinx.coroutines.test.runTest
 import net.sergeych.bintools.toDump
diff --git a/src/commonTest/kotlin/ToolsTest.kt b/src/commonTest/kotlin/ToolsTest.kt
index 9763fd9..268d807 100644
--- a/src/commonTest/kotlin/ToolsTest.kt
+++ b/src/commonTest/kotlin/ToolsTest.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlinx.coroutines.test.runTest
 import net.sergeych.bintools.encodeToHex
 import net.sergeych.crypto2.BinaryId
diff --git a/src/commonTest/kotlin/assertThrows.kt b/src/commonTest/kotlin/assertThrows.kt
index dc63eeb..7f4db51 100644
--- a/src/commonTest/kotlin/assertThrows.kt
+++ b/src/commonTest/kotlin/assertThrows.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import kotlin.test.fail
 
 inline fun <reified T: Throwable>assertThrows(f: ()->Unit): T {
diff --git a/src/commonTest/kotlin/test_tools.kt b/src/commonTest/kotlin/test_tools.kt
index e8716ce..7a43d2f 100644
--- a/src/commonTest/kotlin/test_tools.kt
+++ b/src/commonTest/kotlin/test_tools.kt
@@ -1,3 +1,13 @@
+/*
+ * Copyright (c) 2025. Sergey S. Chernov - All Rights Reserved
+ *
+ *  You may use, distribute and modify this code under the
+ * terms of the private license, which you must obtain from the author
+ *
+ * To obtain the license, contact the author: https://t.me/real_sergeych or email to
+ * real dot sergeych at gmail.
+ */
+
 import net.sergeych.bipack.BipackDecoder
 import net.sergeych.bipack.BipackEncoder