Decrypt given data previously encoded with cast-cbc cipher algo. CAST in CBC (Cipher Block Chaining) mode, where each plaintext block is XOR'd with the previous ciphertext block before encryption. CAST, a block cipher developed in the 1990s, was designed for high performance and security, with CBC mode being one of the earliest block cipher modes. CAST-CBC is considered secure, but it is less commonly used compared to modern ciphers like AES. 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.