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How many keys in AES?

shivajikobardan

Oct 21, 2021
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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?
 

Harald Kapp

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Nov 17, 2011
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You have 1 cipher key, from that the different round keys are created by the algorithm (link). AES128 uses 10+1 round keys.
 
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