Decrypt given data previously encoded with camellia-256-ctr cipher algo. Camellia in 256-bit key size with CTR mode, turning the block cipher into a stream cipher using a counter. Developed as part of the Camellia family by Mitsubishi Electric and NTT, CTR mode supports fast, parallelized encryption. Camellia-256-CTR is highly secure, fast, and efficient, widely used in high-performance systems. 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.