diff --git a/app/src/main/java/com/rosetta/messenger/crypto/MessageCrypto.kt b/app/src/main/java/com/rosetta/messenger/crypto/MessageCrypto.kt
index eaf2135..77683bf 100644
--- a/app/src/main/java/com/rosetta/messenger/crypto/MessageCrypto.kt
+++ b/app/src/main/java/com/rosetta/messenger/crypto/MessageCrypto.kt
@@ -303,12 +303,22 @@ object MessageCrypto {
         secureRandom.nextBytes(iv)
         val ivHex = iv.toHex()
         
-        // Шифруем keyAndNonce напрямую с AES-CBC используя sharedSecret как ключ
-        // React Native теперь использует crypto.enc.Latin1 для binary data
+        // КРИТИЧНО: Эмулируем поведение crypto-js!
+        // React Native делает: key.toString('binary') → crypto.AES.encrypt(string, ...)
+        // crypto-js интерпретирует string как UTF-8!
+        // Поэтому: ByteArray → Latin1 String → UTF-8 bytes → encrypt
+        val latin1String = String(keyAndNonce, Charsets.ISO_8859_1)
+        val utf8Bytes = latin1String.toByteArray(Charsets.UTF_8)
+        
+        android.util.Log.d("MessageCrypto", "📝 Key encoding:")
+        android.util.Log.d("MessageCrypto", "  - Original bytes: ${keyAndNonce.size}")
+        android.util.Log.d("MessageCrypto", "  - Latin1 string chars: ${latin1String.length}")
+        android.util.Log.d("MessageCrypto", "  - UTF-8 bytes: ${utf8Bytes.size}")
+        
         val aesKey = SecretKeySpec(sharedSecret, "AES")
         val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
         cipher.init(Cipher.ENCRYPT_MODE, aesKey, IvParameterSpec(iv))
-        val encryptedKey = cipher.doFinal(keyAndNonce)
+        val encryptedKey = cipher.doFinal(utf8Bytes)
         val encryptedKeyHex = encryptedKey.toHex()
         
         // Формат как в RN: btoa(ivHex:encryptedHex:ephemeralPrivateHex)
@@ -358,7 +368,21 @@ object MessageCrypto {
         val cipher = Cipher.getInstance("AES/CBC/PKCS5Padding")
         cipher.init(Cipher.DECRYPT_MODE, aesKey, IvParameterSpec(iv))
         
-        return cipher.doFinal(encryptedKey)
+        val decryptedUtf8Bytes = cipher.doFinal(encryptedKey)
+        
+        // КРИТИЧНО: Обратная конвертация как в crypto-js!
+        // crypto-js делает: decrypt → WordArray → .toString(Utf8) → string
+        // Потом: Buffer.from(string, 'binary') → bytes
+        // Эквивалент: UTF-8 bytes → UTF-8 string → Latin1 bytes
+        val utf8String = String(decryptedUtf8Bytes, Charsets.UTF_8)
+        val originalBytes = utf8String.toByteArray(Charsets.ISO_8859_1)
+        
+        android.util.Log.d("MessageCrypto", "📝 Key decoding:")
+        android.util.Log.d("MessageCrypto", "  - Decrypted UTF-8 bytes: ${decryptedUtf8Bytes.size}")
+        android.util.Log.d("MessageCrypto", "  - UTF-8 string chars: ${utf8String.length}")
+        android.util.Log.d("MessageCrypto", "  - Original bytes: ${originalBytes.size}")
+        
+        return originalBytes
     }
     
     /**