Decrypt given data previously encoded with aes-128-ofb cipher algo. AES-128 in Output Feedback mode. A stream cipher mode that feeds encrypted output back into the encryption process. Secure but vulnerable to known-plaintext attacks if used improperly. 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.