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Reference.org
AES instruction set
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<p>An Advanced Encryption Standard instruction set (AES instruction set) is a set of instructions that are specifically designed to perform <a href="/facts/AES_encryption/HdXGBY2Q">AES encryption</a> and decryption operations efficiently. These instructions are typically found in modern processors and can greatly accelerate AES operations compared to software implementations. An AES instruction set includes instructions for <a href="/facts/Key_expansion/uVQSNI4H">key expansion</a>, encryption, and decryption using various key sizes (128-bit, 192-bit, and 256-bit). </p><p>The instruction set is often implemented as a set of instructions that can perform a single round of AES along with a special version for the last round which has a slightly different method. </p><p>When AES is implemented as an instruction set instead of as software, it can have improved security, as its <a href="/facts/Side_channel_attack/2B1dfBty">side channel attack</a> surface is reduced. </p>