File Protection Technique using AES Encryption

In an increasingly diverse work environment and increasingly intelligent cyber-attacks, the existing perimeter-based data security is no longer effective. In particular, sensitive information such as personal information should be encrypted and stored or transmitted so that only authorized users can access it. In this paper, we use the most secure AES symmetric key encryption algorithm and SHA-512-based hash algorithm to generate a unique key for the encryption and decryption process of important files stored in a computer system to provide confidentiality. Based on this, we implement an AES encryption file technique that ensures that only authorized users can safely access files by comparing the generated unique key with the system key.