Decrypt given data previously encoded with aes-256-cfb8 cipher algo. AES with 256-bit key in CFB mode with a feedback size of 8 bits, offering byte-oriented encryption. Optimized for environments requiring encryption at the byte level, but not as widely used as CFB128. More secure than CFB1, but CFB128 or other AES modes are generally preferred. 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.