[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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