[cryptography] Minimally Sufficient Cryptosystem

Jonathan Katz jkatz at cs.umd.edu
Tue Jul 5 09:05:55 EDT 2011


On Tue, 5 Jul 2011, Scott Guthery wrote:

> Adi Shamir gave a talk at MIT last week at which I think he said that the 
> following cryptosystem was minimally sufficient:
>
> XOR Key / Permutation / XOR Key
>
> He seemed to me to imply that (informally speaking) any additional complexity 
> would be more likely to provide attack opportunities than not.
>
> Perhaps anybody else that was there or is familiar with Shamir's work along 
> this line might comment.

Hard to say what he was talking about without some context, but it sounds 
like he might (?) have been referring to DES-X:
   http://en.wikipedia.org/wiki/DES-X



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