Abstract
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.
Original language | English |
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Title of host publication | Fast Software Encryption |
Subtitle of host publication | 17th International Workshop, FSE 2010, Seoul, Korea, February 7-10, 2010, Revised Selected Papers |
Editors | Seokhie Hong, Tetsu Iwata |
Place of Publication | Berlin |
Publisher | Springer |
Pages | 1-18 |
Number of pages | 18 |
ISBN (Electronic) | 978-3-642-13858-4 |
ISBN (Print) | 978-3-642-13857-7 |
DOIs | |
Publication status | Published - 2010 |
Event | 17th International Workshop on Fast Software Encryption, FSE 2010 - Seoul, Korea, Republic of Duration: 7 Feb 2010 → 10 Feb 2010 Conference number: 17 |
Publication series
Name | Lecture Notes in Computer Science |
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Publisher | Springer |
Volume | 6147 |
ISSN (Print) | 0302-9743 |
ISSN (Electronic) | 1611-3349 |
Workshop
Workshop | 17th International Workshop on Fast Software Encryption, FSE 2010 |
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Abbreviated title | FSE |
Country/Territory | Korea, Republic of |
City | Seoul |
Period | 7/02/10 → 10/02/10 |