Decrypt given data previously encoded with aes-128-cfb8 cipher algo. AES-128-CFB with 8-bit feedback size. A variant of CFB optimized for byte-oriented operations. Secure but vulnerable to manipulation if an attacker can modify ciphertext blocks. 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.