Difference between revisions of "SHA-1"

From The ECRYPT Hash Function Website
(→‎Others)
(→‎Collision Attacks)
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=== Collision Attacks ===
 
=== Collision Attacks ===
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+
<bibtex>
 +
@inproceedings{fseSugitaKPI07,
 +
  author    = {Makoto Sugita and Mitsuru Kawazoe and Ludovic Perret and Hideki Imai},
 +
  title    = {Algebraic Cryptanalysis of 58-Round SHA-1},
 +
  pages    = {349-365},
 +
  url        = {http://dx.doi.org/10.1007/978-3-540-74619-5_22},
 +
  editor    = {Alex Biryukov},
 +
  booktitle = {FSE},
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  publisher = {Springer},
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  series    = {LNCS},
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  volume    = {4593},
 +
  year      = {2007},
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  isbn      = {978-3-540-74617-1},
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  abstract  = {In 2004, a new attack against SHA-1 has been proposed
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by a team leaded by Wang [15]. The aim of this article is to sophisticate
 +
and improve Wang’s attack by using algebraic techniques. We introduce
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new notions, namely semi-neutral bit and adjuster and propose then an
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improved message modification technique based on algebraic techniques.
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In the case of the 58-round SHA-1, the experimental complexity of our
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improved attack is 2<sup>31</sup> SHA-1 computations, whereas Wang’s method needs
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2<sup>34</sup> SHA-1 computations. We have found many new collisions for the 58-round SHA-1.
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We also study the complexity of our attack for the full SHA-1.}
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}
 +
</bibtex>
 
<bibtex>
 
<bibtex>
 
@inproceedings{sacryptCanniereMR07,
 
@inproceedings{sacryptCanniereMR07,

Revision as of 12:19, 11 March 2008

1 Specification

  • digest size: 160 bits
  • max. message length: < 264 bits
  • compression function: 512-bit message block, 160-bit chaining variable
  • Specification: FIPS 180-2 Secure Hash Standard

2 Cryptanalysis

2.1 Best Known Results

The best collision attack on full SHA-1 was published by Wang et al. It has complexity of 269 hash evaluations. The best collision example, a 70-step collision for SHA-1, was published by DeCanniere, Mendel and Rechberger.

2.2 Collision Attacks

Makoto Sugita, Mitsuru Kawazoe, Ludovic Perret, Hideki Imai - Algebraic Cryptanalysis of 58-Round SHA-1

FSE 4593:349-365,2007
http://dx.doi.org/10.1007/978-3-540-74619-5_22
Bibtex
Author : Makoto Sugita, Mitsuru Kawazoe, Ludovic Perret, Hideki Imai
Title : Algebraic Cryptanalysis of 58-Round SHA-1
In : FSE -
Address :
Date : 2007

Christophe De Canni\`ere, Florian Mendel, Christian Rechberger - Collisions for 70-Step SHA-1: On the Full Cost of Collision Search

Selected Areas in Cryptography 4876:56-73,2007
http://dx.doi.org/10.1007/978-3-540-77360-3_4
Bibtex
Author : Christophe De Canni\`ere, Florian Mendel, Christian Rechberger
Title : Collisions for 70-Step SHA-1: On the Full Cost of Collision Search
In : Selected Areas in Cryptography -
Address :
Date : 2007

Christophe De Canni\`ere, Christian Rechberger - Finding SHA-1 Characteristics: General Results and Applications

ASIACRYPT 4284:1-20,2006
http://dx.doi.org/10.1007/11935230_1
Bibtex
Author : Christophe De Canni\`ere, Christian Rechberger
Title : Finding SHA-1 Characteristics: General Results and Applications
In : ASIACRYPT -
Address :
Date : 2006

Charanjit S. Jutla, Anindya C. Patthak - Provably Good Codes for Hash Function Design

Selected Areas in Cryptography 4356:376-393,2006
http://dx.doi.org/10.1007/978-3-540-74462-7_26
Bibtex
Author : Charanjit S. Jutla, Anindya C. Patthak
Title : Provably Good Codes for Hash Function Design
In : Selected Areas in Cryptography -
Address :
Date : 2006

Norbert Pramstaller, Christian Rechberger, Vincent Rijmen - Impact of Rotations in SHA-1 and Related Hash Functions

Selected Areas in Cryptography 3897:261-275,2005
http://dx.doi.org/10.1007/11693383_18
Bibtex
Author : Norbert Pramstaller, Christian Rechberger, Vincent Rijmen
Title : Impact of Rotations in SHA-1 and Related Hash Functions
In : Selected Areas in Cryptography -
Address :
Date : 2005

Vincent Rijmen, Elisabeth Oswald - Update on SHA-1

CT-RSA pp. 58-71,2005
http://dx.doi.org/10.1007/b105222
Bibtex
Author : Vincent Rijmen, Elisabeth Oswald
Title : Update on SHA-1
In : CT-RSA -
Address :
Date : 2005

2.3 Preimage Attacks

  • We are not aware of any articles w.r.t. preimage attacks on SHA-1.

2.4 Others

Florian Mendel, Norbert Pramstaller, Christian Rechberger, Vincent Rijmen - The Impact of Carries on the Complexity of Collision Attacks on SHA-1

FSE 4047:278-292,2006
http://dx.doi.org/10.1007/11799313_18
Bibtex
Author : Florian Mendel, Norbert Pramstaller, Christian Rechberger, Vincent Rijmen
Title : The Impact of Carries on the Complexity of Collision Attacks on SHA-1
In : FSE -
Address :
Date : 2006

Akashi Satoh - Hardware Architecture and Cost Estimates for Breaking SHA-1

ISC 3650:259-273,2005
http://dx.doi.org/10.1007/11556992_19
Bibtex
Author : Akashi Satoh
Title : Hardware Architecture and Cost Estimates for Breaking SHA-1
In : ISC -
Address :
Date : 2005
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