Encrypt given data using aes-256-ctr cipher algo. AES with 256-bit key in Counter (CTR) mode, which turns a block cipher into a highly parallelizable stream cipher. Became popular for its performance benefits and resistance to padding oracle attacks. Highly secure when a unique nonce is used for each encryption, making it a preferred choice for modern cryptographic 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.