Encrypt given data using camellia-128-cfb8 cipher algo. Camellia in 128-bit key size with CFB8 mode, encrypting 8 bits at a time for situations where a smaller data block size is beneficial. Camellia, created by Mitsubishi Electric and NTT, includes CFB8 as one of its feedback modes to suit various encryption needs. Considered secure, but its use is less common compared to other modes like CBC or CTR. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.