How many keys in AES?

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terabaaphoonmein

Joined Jul 19, 2020
109
Say we've 16 byte(128 bit) key. So, how many keys would be required?

So, imo. 128 bits key would require 10 rounds

Initial Round(also called add round key), then 10 rounds(including the last round), so we'd require 11 different keys. Am I correct?
 

WBahn

Joined Mar 31, 2012
27,411
Say we've 16 byte(128 bit) key. So, how many keys would be required?

So, imo. 128 bits key would require 10 rounds

Initial Round(also called add round key), then 10 rounds(including the last round), so we'd require 11 different keys. Am I correct?
It's been a long time since I looked at AES, but that is my recollection. You would use the key schedule to generate 11 128-bit round keys from the initial 128-bit key.
 
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