AES

(spectroscopy) A form of atomic spectroscopy in which one observes the emission of light at discrete wavelengths by atoms which have been electronically excited by collisions with other atoms and molecules in a hot gas.

(Advanced Encryption Standard) A NIST-standard cryptographic cipher that uses a block length of 128 bits and key lengths of 128, 192 or 256 bits. Officially replacing the Triple DES method in 2001, AES uses the Rijndael algorithm developed by Joan Daemen and Vincent Rijmen of Belgium. AES can be encrypted in one pass instead of three, and its key size is greater than Triple DES's 168 bits. In early 1997, the NIST invited cryptographers to submit an advanced algorithm. In late 2000, the Rijndael (pronounced "rine-doll") symmetric block cipher algorithm was selected out of submissions by 21 teams from 11 countries. See cipher, cryptography, NIST, DES and AES/CCMP.

(2) (Audio Engineering Society, Inc., New York, www.aes.org) A membership association devoted to audio technology research and development, marketing and education. Founded in 1948, technical standards have been continually developed under its auspices. AES is dedicated to ensuring that audio quality is maintained in the digital world. See AES/EBU.

(3) (Automated Export System) A U.S. Customs Service application that tracks goods exported to foreign countries.

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