Secure Science issues preview of their upcoming block cipher

David Wagner daw at
Fri Mar 25 12:02:40 EST 2005

Jerrold Leichter writes:
>They don't claim that:
>	This cipher is ... provably just as secure as AES-128.
>I can come up with a cipher provably just as secure as AES-128 very quickly....

Actually, I think Adam is totally right.

Have you looked at their scheme?
The way to come up with a cipher provably as secure as AES-128 is to use
AES-128 as part of your cipher -- but their scheme does not do anything
like that.

I am very skeptical about claims that they have a mathematical proof that
CS2-128 is as secure as AES-128.  I want to see the proof.

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