Decrypt given data previously encoded with aes-256-gcm cipher algo. AES with 256-bit key in GCM (Galois/Counter Mode), which provides authenticated encryption. Introduced as an authenticated encryption mode to enhance security and integrity verification. Highly secure and recommended for modern cryptographic applications. Our decryption process assumes the IV string is prepended in the encoded string during the encryption process. You can not decrypt and get the correct results if the IV or passphrase mismatch occurs between encryption and decryption process.