Encrypt given data using camellia-192-ecb cipher algo. Camellia in 192-bit key size with ECB mode, which encrypts each block independently. Like other Camellia modes, ECB mode is included for simplicity, though its security issues are well-known. ECB is insecure due to its lack of diffusion, making it unsuitable for most applications. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.