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AES is a block cipher algorithm that can be used in various modes of operation. Learn about the different libraries, applications and modes of AES, such as CBC, CTR, GCM and more.
AES is a symmetric-key algorithm for encrypting electronic data, with key sizes of 128, 192 or 256 bits. AES is a variant of Rijndael, a family of ciphers developed by Daemen and Rijmen, and is the first cipher approved by the U.S. NSA for top secret information.
Learn about the AES instruction set, a set of instructions that perform AES encryption and decryption efficiently. Find out which Intel processors support AES-NI, the first major implementation of AES-NI, and compare it with other architectures and hardware accelerators.
Learn about the substitution box (S-box) used in the Rijndael cipher, the basis of the Advanced Encryption Standard (AES) algorithm. See the forward and inverse S-box tables, the Nyberg S-box transformation, and the affine transformation.
Learn how the AES algorithm was chosen as a standard by NIST from 1997 to 2000, after a public and transparent competition involving 15 candidates. AES is a symmetric block cipher with 128-bit blocks and 128-, 192-, or 256-bit keys.
The MixColumns operation performed by the Rijndael cipher or Advanced Encryption Standard is, along with the ShiftRows step, its primary source of diffusion.. Each column of bytes is treated as a four-term polynomial () = + + +, each byte representing an element in the Galois field ().
Learn about the algorithms that use a block cipher to provide information security such as confidentiality or authenticity. Cipher block chaining (CBC) is one of the modes that requires an initialization vector (IV) to randomize the encryption.
Learn what a message authentication code (MAC) is, how it works, and why it is used for authenticating and integrity-checking messages. Compare MAC with cryptographic hash functions, digital signatures, and other cryptographic primitives.