Improved Message Passing Techniques in Fast Correlation Attacks on Stream Ciphers
(2012) 7th International Symposium on Turbo Codes & Iterative Information Processing p.260-264- Abstract
- The fast correlation attack is a general cryptanalytic attack directed at stream ciphers and is related to the decoding of low-density parity-check (LDPC) codes. In this paper, we improve the message passing algorithm by exploiting the fact that the sum of an arbitrary number of initial state variables, called a fixed point, can be written as the sum of only a few other variables. This will result in better use of information in the message passing algorithm. Simulations show that this added information results in better success probabilities for the attack. Our technique may also find applications to LDPC codes with girth $4$, although such codes are normally avoided.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2682437
- author
- Ågren, Martin LU ; Hell, Martin LU ; Johansson, Thomas LU and Löndahl, Carl LU
- organization
- publishing date
- 2012
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 7th International Symposium onTurbo Codes and Iterative Information Processing (ISTC), 2012
- pages
- 260 - 264
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- 7th International Symposium on Turbo Codes & Iterative Information Processing
- conference location
- Gothenburg, Sweden
- conference dates
- 2012-08-27 - 2012-08-31
- external identifiers
-
- scopus:84870807583
- ISBN
- 978-1-4577-2114-4
- DOI
- 10.1109/ISTC.2012.6325183
- language
- English
- LU publication?
- yes
- id
- 649c2ed3-a886-44ad-a7bd-73c219951860 (old id 2682437)
- date added to LUP
- 2016-04-04 12:03:53
- date last changed
- 2023-09-20 13:26:21
@inproceedings{649c2ed3-a886-44ad-a7bd-73c219951860, abstract = {{The fast correlation attack is a general cryptanalytic attack directed at stream ciphers and is related to the decoding of low-density parity-check (LDPC) codes. In this paper, we improve the message passing algorithm by exploiting the fact that the sum of an arbitrary number of initial state variables, called a fixed point, can be written as the sum of only a few other variables. This will result in better use of information in the message passing algorithm. Simulations show that this added information results in better success probabilities for the attack. Our technique may also find applications to LDPC codes with girth $4$, although such codes are normally avoided.}}, author = {{Ågren, Martin and Hell, Martin and Johansson, Thomas and Löndahl, Carl}}, booktitle = {{7th International Symposium onTurbo Codes and Iterative Information Processing (ISTC), 2012}}, isbn = {{978-1-4577-2114-4}}, language = {{eng}}, pages = {{260--264}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{Improved Message Passing Techniques in Fast Correlation Attacks on Stream Ciphers}}, url = {{http://dx.doi.org/10.1109/ISTC.2012.6325183}}, doi = {{10.1109/ISTC.2012.6325183}}, year = {{2012}}, }