Difference between revisions of "Twister"
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</bibtex> | </bibtex> | ||
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== Cryptanalysis == | == Cryptanalysis == | ||
| + | |||
| + | {| border="1" cellpadding="4" cellspacing="0" class="wikitable" style="text-align:center" | ||
| + | |- style="background:#efefef;" | ||
| + | | Type of Analysis || Hash Function Part || Hash Size (n) || Parameters/Variants || Compression Function Calls || Memory Requirements || Reference | ||
| + | |- | ||
| + | | | pseudo-collision || compression || all || || 2<sup>8</sup> || - || [http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=104903 Mendel,Rechberger,Schläffer] | ||
| + | |- | ||
| + | | style="background:greenyellow" | collision || hash || 512 || || 2<sup>252</sup> || 2<sup>9</sup> || [http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=104903 Mendel,Rechberger,Schläffer] | ||
| + | |- | ||
| + | | style="background:orange" | 2nd preimage || hash || 512 || || 2<sup>384+s</sup> || 2<sup>64-s</sup> || [http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=104903 Mendel,Rechberger,Schläffer] | ||
| + | |- | ||
| + | | style="background:orange" | preimage || hash || 512 || || 2<sup>456</sup> || 2<sup>10</sup> || [http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=104903 Mendel,Rechberger,Schläffer] | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | A description of this table is given [http://ehash.iaik.tugraz.at/wiki/Cryptanalysis_Categories#Individual_Hash_Function_Tables here]. | ||
| + | |||
| + | |||
| + | <bibtex> | ||
| + | @misc{acnsMRS09, | ||
| + | author = {Florian Mendel and Christian Rechberger and Martin Schläffer}, | ||
| + | title = {Cryptanalysis of Twister}, | ||
| + | url = {http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=104903}, | ||
| + | howpublished = {In Proceedings of ACNS, Springer}, | ||
| + | year = {2009}, | ||
| + | abstract = {In this paper, we present a semi-free-start collision attack on the compression | ||
| + | function for all Twister variants with negligible complexity. We show how this | ||
| + | compression function attack can be extended to construct collisions for | ||
| + | Twister-512 slightly faster than brute force search. Furthermore, we present a | ||
| + | second-preimage and preimage attack for Twister-512 with complexity of about | ||
| + | $2^{384}$ and $2^{456}$ compression function evaluations, respectively.} | ||
| + | </bibtex> | ||
| + | |||
| + | |||
| + | === Archive === | ||
<bibtex> | <bibtex> | ||
| Line 25: | Line 61: | ||
howpublished = {Available online}, | howpublished = {Available online}, | ||
year = {2008}, | year = {2008}, | ||
| − | abstract = {In this paper, we present a pseudo-collision attack on the compression function of all Twister variants (224,256,384,512) with complexity of about 2^26.5 compression function | + | abstract = {In this paper, we present a pseudo-collision attack on the compression function of all |
| + | Twister variants (224,256,384,512) with complexity of about 2^26.5 compression function evalua- | ||
| + | tions. We show how the compression function attack can be extended to construct collisions for | ||
| + | Twister-512 slightly faster than brute force search. Furthermore, we present a second-preimage at- | ||
| + | tack for Twister-512 with complexity of about 2^448 compression function evaluations and memory | ||
| + | requirement of 2^64. | ||
} | } | ||
</bibtex> | </bibtex> | ||
Latest revision as of 11:16, 24 June 2009
1 The algorithm
- Author(s): Ewan Fleischmann, Christian Forler and Michael Gorski
- Website: http://www.twister-hash.com
- NIST submission package: Twister.zip
Ewan Fleischmann, Christian Forler, Michael Gorski - The Twister Hash Function Family
- ,2008
- http://ehash.iaik.tugraz.at/uploads/3/39/Twister.pdf
BibtexAuthor : Ewan Fleischmann, Christian Forler, Michael Gorski
Title : The Twister Hash Function Family
In : -
Address :
Date : 2008
2 Cryptanalysis
| Type of Analysis | Hash Function Part | Hash Size (n) | Parameters/Variants | Compression Function Calls | Memory Requirements | Reference |
| pseudo-collision | compression | all | 28 | - | Mendel,Rechberger,Schläffer | |
| collision | hash | 512 | 2252 | 29 | Mendel,Rechberger,Schläffer | |
| 2nd preimage | hash | 512 | 2384+s | 264-s | Mendel,Rechberger,Schläffer | |
| preimage | hash | 512 | 2456 | 210 | Mendel,Rechberger,Schläffer |
A description of this table is given here.
Florian Mendel, Christian Rechberger, Martin Schläffer - Cryptanalysis of Twister
- ,2009
- http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=104903
BibtexAuthor : Florian Mendel, Christian Rechberger, Martin Schläffer
Title : Cryptanalysis of Twister
In : -
Address :
Date : 2009
2.1 Archive
Florian Mendel, Christian Rechberger, Martin Schläffer - Cryptanalysis of Twister
