Decrypt given data previously encoded with id-aes256-CCM cipher algo. AES with 256-bit key size in CCM (Counter with CBC-MAC) mode, offering both confidentiality and integrity. AES-256-CCM is a high-security algorithm commonly used in secure communication protocols to ensure both encryption and authentication. AES-256-CCM is very secure, and is often used in high-security environments such as military or governmental communications. Our decryption process assumes the IV string is prepended in the encoded string during the encryption process. You can not decrypt and get the correct results if the IV or passphrase mismatch occurs between encryption and decryption process.