FuckMyBytes4

Everything happens in your browser, don't worry about privacy.

Encrypt Decrypt Encrypt File Decrypt File

How it works?

1. Key generation
   1. Generates a random 16-byte salt
   2. Convert password into bytes with UTF-8 encoding
   3. First round: PBKDF2 the password (SHA-256, 600,000x, 256 bits, salt)
   4. Second round: PBKDF2 the result (SHA-512, 100,000x, 256 bits, salt)
   5. Secure the final 32-byte key
2. Encryption
   1. Generates a 12-byte nonce for GCM
   2. Creates associated data (version + salt + timestamp) for authentication
   3. Sets up AES-256 in GCM mode (authenticated encryption)
   4. Encrypt bytes using AES-GCM with associated data
   5. Combine the data in the following order:
      - First 4 bytes: Version header ("FMB4")
      - Next 16 bytes: Salt
      - Next 8 bytes: Timestamp
      - Next 12 bytes: GCM Nonce
      - Remaining: Encrypted data + 16-byte authentication tag

Go go pocket byte fucker!