Security and Cryptography - Chapter 6: Advanced Encryption Standard

Advanced Encryption Standard (AES)

A symmetric encryption algorithm adopted by NIST as an official Federal Information Processing Standard in 2001, superseding DES.

field

A set of elements with mathematical operations that satisfy specific algebraic properties.

finite field

A field with a finite number of elements, often used in cryptographic algorithms like AES.

key expansion

The process of generating multiple round keys from the original encryption key for use in block ciphers.

S-box

Substitution box; a component in block ciphers that performs nonlinear substitution of data to increase security.

avalanche effect

A property where a small change in the input results in a significant change in the output, essential for encryption security.