Encrypt given data using aes-256-ecb cipher algo. AES with 256-bit key in ECB (Electronic Codebook) mode, which encrypts each block independently. Advanced Encryption Standard (AES) was established by NIST in 2001. ECB mode is one of the simplest but least secure modes due to its lack of diffusion. Considered insecure due to patterns being preserved in ciphertext. Not recommended for use. Our encryption process prepends the IV string used during the encryption process in the encrypted data so that it can be used during decryption.