[Cryptography Team] DESPlugin is broken
Levente Uzonyi
leves at elte.hu
Sat Jul 24 10:27:43 UTC 2010
On Sat, 24 Jul 2010, Rob Withers wrote:
> Hans-Martin Mosner, if you have your ears on, I could use some help figuring
> out the algorithm. Anyone else for that matter.
>
> Here is the spec:
> http://csrc.nist.gov/publications/fips/fips46-3/fips46-3.pdf
>
> The key is cooked for encryption or decryption
> The data block is submitted for encryption (or decryption, depending on the
> cooked key)
> - first the data block is permuted using the Initial Permutation
> - result of the permutation step is encrypted using the cooked key
> - result of the encryption step is permuted using the inverse of the
> Initial Permutation
>
> I do not know if the problem is with the key cooking or the encryption
> transformation.
>
> Thanks for any help!
Do the tests in the Cryptography package pass for you?
Levente
>
> Rob
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