Cryptanalysis of the DECT Standard Cipher [chapter]

Karsten Nohl, Erik Tews, Ralf-Philipp Weinmann
2010 Lecture Notes in Computer Science  
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
more » ... m 2 15 keystreams on a standard PC with a success rate of 50% within hours; somewhat faster when a CUDA graphics adapter is available.
doi:10.1007/978-3-642-13858-4_1 fatcat:czybpkk2vfdj7euccfrudbk6he