DSC - Reverse Engineering of the Samsung DECT SP-R6150
ralf at coderpunks.org
Mon Jan 26 12:29:23 CET 2009
On Jan 26, 2009, at 12:06 , Dimi Ortega wrote:
> They talked on chaos radio it will be maybe only a matter of one
> night work to fully reverse the DSC.
The necessary work has been done now. Since I screwed up the first
time however (I had accidentially reversed the byte order of the key/
IV bytes and therefore obtained an incorrect filter function), I'd
rather verify it again before releasing it.
> But if this was alkready done in 2002 that would be crazy!
> @dedected is the 2002 reverse DSC code already known to you?
Yes. It's crap. It is _NOT_ the DECT standard cipher. The DSC is LFSR-
based as can be seen from .
I think (I'm not sure though) I've briefly mentioned that Usenet
posting in our talk @25C3, I'm sure I've mentioned it in the CRE102
 Manuel J. Alvarez Alvarez: Data ciphering device
US Patent 5608802, filed Dec 27th, 1994, issued Mar 4, 1997
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