Advanced Encryption Standard: Difference between revisions
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The '''Advanced Encryption Standard''', or '''AES''', is a US government specification for a [[block cipher]] to replace the earlier and weaker [[Data Encryption Standard]] (DES). | The '''Advanced Encryption Standard''', or '''AES''', is a US government specification for a [[block cipher]] to replace the earlier and weaker [[Data Encryption Standard]] (DES). | ||
Revision as of 04:40, 31 May 2009
The Advanced Encryption Standard, or AES, is a US government specification for a block cipher to replace the earlier and weaker Data Encryption Standard (DES).
AES encrypts data in 128-bit blocks and can take a 128, 192 or 256-bit key. DES used 64-bit blocks and a 56-bit key.
Starting in the late 90s, the US National Institute of Standards and Technology (NIST) ran a contest to find a block cipher to replace DES. The result is the Advanced Encryption Standard. In October 2002, they announced [1] the winner — Rijndael (pronounced approximately "rhine doll"), from two Belgian designers.
The NIST page on AES [2] has much detail, including links to all the Rinjdael design documents, to several implementations, and to the official standard, approved as FIPS 197,