Encrypt given data using camellia-128-cfb cipher algo. Camellia in 128-bit key size with CFB (Cipher Feedback) mode, a stream cipher mode that encrypts small units of data. Camellia was created by Mitsubishi Electric and NTT in the early 2000s as a block cipher alternative to AES. Camellia is considered very secure and is widely accepted in cryptographic standards, including in environments requiring high security. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.