Difference between revisions of "Hamsi"

From The ECRYPT Hash Function Website
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(Second preimage attack on Hamsi by Fuhr)
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| Type of Analysis || Hash Function Part || Hash Size (n) || Parameters/Variants || Compression Function Calls || Memory Requirements ||  Reference  
 
| Type of Analysis || Hash Function Part || Hash Size (n) || Parameters/Variants || Compression Function Calls || Memory Requirements ||  Reference  
 
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| 2nd-preimage || hash function || 256 || (default) || 2<sup>251.3</sup> || ? || [http://dx.doi.org/10.1007/978-3-642-17373-8_2 Fuhr]
 
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|  Type of Analysis || Hash Function Part || Hash Size (n) || Parameters/Variants || Compression Function Calls || Memory Requirements ||  Reference  
 
|  Type of Analysis || Hash Function Part || Hash Size (n) || Parameters/Variants || Compression Function Calls || Memory Requirements ||  Reference  
 
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|-
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|    observations || hash || all || ||  ||  || [http://people.item.ntnu.no/~danilog/Hash/Non-random-behaviour-narrow-pipe-designs-03.pdf Gligoroski]
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|    observations || hash function || all || ||  ||  || [http://people.item.ntnu.no/~danilog/Hash/Non-random-behaviour-narrow-pipe-designs-03.pdf Gligoroski]
 
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|    non-randomness || compression function || 224, 256 || 5 rounds ||  ||  || [http://ehash.iaik.tugraz.at/uploads/d/db/Hamsi_nonrandomness.txt Aumasson]
 
|    non-randomness || compression function || 224, 256 || 5 rounds ||  ||  || [http://ehash.iaik.tugraz.at/uploads/d/db/Hamsi_nonrandomness.txt Aumasson]
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<bibtex>
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@misc{Fuhr-asiacrypt10,
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author = {Thomas Fuhr},
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title = {Finding Second Preimages of Short Messages for Hamsi-256},
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url = {http://dx.doi.org/10.1007/978-3-642-17373-8_2},
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howpublished  = {In Advances in Cryptology - ASIACRYPT 2010, Proceedings},
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editor    = {Masayuki Abe},
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year      = {2010},
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pages      = {20-37},
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publisher  = {Springer},
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series    = {Lecture Notes in Computer Science},
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volume    = {6477}
 +
}
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</bibtex>
  
 
<bibtex>
 
<bibtex>

Revision as of 13:41, 6 December 2010

1 The algorithm


Özgül Küçük - The Hash Function Hamsi

,2009
http://www.cosic.esat.kuleuven.be/publications/article-1203.pdf
Bibtex
Author : Özgül Küçük
Title : The Hash Function Hamsi
In : -
Address :
Date : 2009

Özgül Küçük - The Hash Function Hamsi

,2008
http://ehash.iaik.tugraz.at/uploads/9/95/Hamsi.pdf
Bibtex
Author : Özgül Küçük
Title : The Hash Function Hamsi
In : -
Address :
Date : 2008

2 Cryptanalysis

We distinguish between two cases: results on the complete hash function, and results on underlying building blocks.

A description of the tables is given here.

Recommended security parameters: (3,6) P,Pf rounds (n=224,256); (6,12) P,Pf rounds (n=384,512).

2.1 Hash function

Here we list results on the actual hash function. The only allowed modification is to change the security parameter.

Type of Analysis Hash Function Part Hash Size (n) Parameters/Variants Compression Function Calls Memory Requirements Reference
2nd-preimage hash function 256 (default) 2251.3 ? Fuhr


2.2 Building blocks

Here we list results on underlying building blocks, and the hash function modified by other means than the security parameter.

Note that these results assume more direct control or access over some internal variables (aka. free-start, pseudo, compression function, block cipher, or permutation attacks).

Type of Analysis Hash Function Part Hash Size (n) Parameters/Variants Compression Function Calls Memory Requirements Reference
observations hash function all Gligoroski
non-randomness compression function 224, 256 5 rounds Aumasson
near-collision compression function 224, 256 3 rounds 221 Nikolic
distinguisher compression function 224, 256 6 rounds 227 Aumasson,Meier
distinguisher compression function 384, 512 12 rounds 2729 Aumasson,Meier
near-collision compression function 224, 256 3 rounds 25 Wang,Wang,Jia,Wang
near-collision compression function 224, 256 4 rounds 232 Wang,Wang,Jia,Wang
near-collision compression function 224, 256 5 rounds 2125 Wang,Wang,Jia,Wang
message-recovery compression function 224, 256 3 rounds 210.48 Calik,Turan
pseudo-2nd-preimage hash function 256 (3,6) rounds 2254.25 Calik,Turan


Thomas Fuhr - Finding Second Preimages of Short Messages for Hamsi-256

,2010
http://dx.doi.org/10.1007/978-3-642-17373-8_2
Bibtex
Author : Thomas Fuhr
Title : Finding Second Preimages of Short Messages for Hamsi-256
In : -
Address :
Date : 2010

Danilo Gligoroski - Narrow-pipe SHA-3 candidates differ significantly from ideal random functions defined over big domains

,2010
http://people.item.ntnu.no/~danilog/Hash/Non-random-behaviour-narrow-pipe-designs-03.pdf
Bibtex
Author : Danilo Gligoroski
Title : Narrow-pipe SHA-3 candidates differ significantly from ideal random functions defined over big domains
In : -
Address :
Date : 2010

Jean-Philippe Aumasson - On the pseudorandomness of Hamsi

,2009
http://ehash.iaik.tugraz.at/uploads/d/db/Hamsi_nonrandomness.txt
Bibtex
Author : Jean-Philippe Aumasson
Title : On the pseudorandomness of Hamsi
In : -
Address :
Date : 2009

Ivica Nikolic - Near Collisions for the Compression Function of Hamsi-256

,2009
http://rump2009.cr.yp.to/936779b3afb9b48a404b487d6865091d.pdf
Bibtex
Author : Ivica Nikolic
Title : Near Collisions for the Compression Function of Hamsi-256
In : -
Address :
Date : 2009

Jean-Philippe Aumasson, Willi Meier - Zero-sum distinguishers for reduced Keccak-f and for the core functions of Luffa and Hamsi

,2009
http://www.131002.net/data/papers/AM09.pdf
Bibtex
Author : Jean-Philippe Aumasson, Willi Meier
Title : Zero-sum distinguishers for reduced Keccak-f and for the core functions of Luffa and Hamsi
In : -
Address :
Date : 2009

Meiqin Wang, Xiaoyun Wang, Keting Jia, Wei Wang - New Pseudo-Near-Collision Attack on Reduced-Round of Hamsi-256

,2009
http://eprint.iacr.org/2009/484.pdf
Bibtex
Author : Meiqin Wang, Xiaoyun Wang, Keting Jia, Wei Wang
Title : New Pseudo-Near-Collision Attack on Reduced-Round of Hamsi-256
In : -
Address :
Date : 2009

Cagdas Calik, Meltem Sonmez Turan - Message Recovery and Pseudo-Preimage Attacks on the Compression Function of Hamsi-256

http://eprint.iacr.org/2010/057.pdf
Bibtex
Author : Cagdas Calik, Meltem Sonmez Turan
Title : Message Recovery and Pseudo-Preimage Attacks on the Compression Function of Hamsi-256
In : -
Address :
Date :
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