[145216] in cryptography@c2.net mail archive
Algorithm Disclosure of and Practical Attack against DECT Standard
daemon@ATHENA.MIT.EDU (Dustin D. Trammell)
Wed Apr 14 10:17:18 2010
From: "Dustin D. Trammell" <dtrammell@breakingpoint.microsoftonline.com>
To: "cryptography@metzdowd.com" <cryptography@metzdowd.com>
Date: Tue, 13 Apr 2010 09:29:51 -0500
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"The DECT Standard Cipher (DSC) is a proprietary 64-bit stream cipher
based on irregularly clocked LFSRs and a non-linear output combiner. The
cipher is meant to provide confidentiality for cordless telephony. This
paper illustrates how the DSC was reverse-engineered from a hardware
implementation using custom firmware and information on the structure of
the cipher gathered from a patent. Beyond disclosing the DSC, the paper
proposes a practical attack against DSC that recovers the secret key
from 215 keystreams on a standard PC with a success rate of 50% within
hours; somewhat faster when a CUDA graphics adapter is available."
https://dedected.org/trac/raw-attachment/wiki/DSC-Analysis/FSE2010-166.pdf
This is from FSE 2010 in February, but I hadn't seen it mentioned here
yet.
--=20
Dustin D. Trammell
Security Researcher
BreakingPoint Systems, Inc.
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