Encrypt given data using aes-192-ocb cipher algo. AES with 192-bit key in Offset Codebook (OCB) mode, which offers authenticated encryption with minimal overhead. A patented encryption mode designed for efficiency and parallelism. Secure but less commonly used due to patent restrictions, which limited its adoption. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.