10 Facts About AES encryption

AES encryption is a variant of the Rijndael block cipher developed by two Belgian cryptographers, Joan Daemen and Vincent Rijmen, who submitted a proposal to NIST during the AES encryption selection process.

The algorithm described by AES encryption is a symmetric-key algorithm, meaning the same key is used for both encrypting and decrypting the data.

AES encryption is based on a design principle known as a substitution–permutation network, and is efficient in both software and hardware.

AES encryption operates on a 4 × 4 column-major order array of 16 bytes termed the state:.

Key size used for an AES encryption cipher specifies the number of transformation rounds that convert the input, called the plaintext, into the final output, called the ciphertext.

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AES encryption has 10 rounds for 128-bit keys, 12 rounds for 192-bit keys, and 14 rounds for 256-bit keys.

The largest successful publicly known brute-force attack against a widely implemented block-cipher AES encryption algorithm was against a 64-bit RC5 key by distributed.

Until May 2009, the only successful published attacks against the full AES encryption were side-channel attacks on some specific implementations.

In October 2005, Dag Arne Osvik, Adi Shamir and Eran Tromer presented a paper demonstrating several cache-timing attacks against the implementations in AES found in OpenSSL and Linux's dm-crypt partition encryption function.

Many modern CPUs have built-in hardware instructions for AES encryption, which protect against timing-related side-channel attacks.