How secure would AES be with all round keys equal?

Asked Nov 11 '18 at 02:52

Active Nov 11 '18 at 20:22

Viewed 175 times

In effect the same 128 bit key is XORed at every round and before and after as whitening.

Would it be 2^128?

What are the dangers of such a naive key schedule and does AES suffer from them?

Edit: Fair enough, slide attack is a problem. It doesn't explain however why there is a key schedule instead of round constants.

edited Nov 11 '18 at 15:39

asked Nov 11 '18 at 02:52

I believe it would be no better than AES with a single round (i.e. trivially breakable). – forest Nov 11 '18 at 03:46
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I believe it will be under slide attack , unless you add round constant – hardyrama Nov 11 '18 at 06:04
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I've just added two other questions to the duplicate list, does this answer your updated question? – SEJPM Nov 11 '18 at 20:20

0 Answers0