Advanced Encryption Standard (AES) is a popular symmetric encryption method to protect data in transit and at rest. It has become the market standard for encrypting and decrypting data because of its security, speed, and efficiency. In addition, the encryption functions using fixed number bits, i.e., 128, 192, or 256, in both the key and block size, where the larger key sizes offer more solid security.

AES Encryption Examples

Pros and Cons of AES Encryption



Tips for Utilizing AES Encryption

How AES Encryption Works

  1. Division and expansion: The encryption starts by breaking down the message’s plaintext into blocks of bits and rows, which are expanded through the AES key schedule. This process adds an encryption key, also called a round key.
  2. Substitution: In this step, the operation replaces the plaintext with encrypted text from some pre-specified table known as the Rijndael S-box.
  3. Shifting: Except for the first row, all the other rows of the newly encrypted text are altered by one position.
  4. Mixing: Encrypted and shifted rows are mixed further to prevent unpermitted users or hackers from easily reversing them back to their original location.
  5. Round key: The data is encrypted again with the round key generated in the first step.
  6. Repeat: This process is repeated several times according to the type of AES.

AES Encryption Key Features

AES Encryption Application