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 |
|---|---|
| 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 |
|---|---|
| Publisher | Springer |
| Volume | 6147 |
| ISSN (Print) | 0302-9743 |
| ISSN (Electronic) | 1611-3349 |
Workshop
| Workshop | 17th International Workshop on Fast Software Encryption, FSE 2010 |
|---|---|
| Abbreviated title | FSE |
| Country/Territory | Korea, Republic of |
| City | Seoul |
| Period | 7/02/10 → 10/02/10 |