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Advanced Encryption Standard - Wikipedia, the free encyclopedia |
 | | — each byte of the state is combined with the round key; each round key is derived from the cipher key using a key schedule. |
 | | For each round, a subkey is derived from the main key using the key schedule; each subkey is the same size as the state. |
 | | As of 2006, the best known attacks are on 7 rounds for 128-bit keys, 8 rounds for 192-bit keys, and 9 rounds for 256-bit keys. |
| en.wikipedia.org /wiki/Advanced_Encryption_Standard (1795 words) |
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