Groestl
1 The algorithm
- Author(s): Praveen Gauravaram, Lars R. Knudsen, Krystian Matusiewicz, Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen
- Website: http://www.groestl.info
- NIST submission package:
- round 1/2: Grostl_Round2.zip (old version: Grostl.zip)
Praveen Gauravaram, Lars R. Knudsen, Krystian Matusiewicz, Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen - Grøstl -- a SHA-3 candidate
- ,2008
- http://www.groestl.info/Groestl.pdf
BibtexAuthor : Praveen Gauravaram, Lars R. Knudsen, Krystian Matusiewicz, Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen
Title : Grøstl -- a SHA-3 candidate
In : -
Address :
Date : 2008
Praveen Gauravaram, Lars R. Knudsen, Krystian Matusiewicz, Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen - Grøstl Addendum
- ,2009
- http://groestl.info/Groestl-addendum.pdf
BibtexAuthor : Praveen Gauravaram, Lars R. Knudsen, Krystian Matusiewicz, Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen
Title : Grøstl Addendum
In : -
Address :
Date : 2009
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 parameter: 10 rounds (n=224,256); 14 rounds (n=384,512)
2.1 Hash function
Here we list results on the hash function according to the NIST requirements. The only allowed modification is to change the security parameter.
| Type of Analysis | Hash Size (n) | Parameters | Compression Function Calls | Memory Requirements | Reference |
| collision | 224,256 | 5 rounds | 248 | 232 | Ideguchi,Tischhauser,Preneel |
| collision | 256 | 6 rounds | 2112 | 232 | Ideguchi,Tischhauser,Preneel |
| semi-free-start collision | 224,256 | 7 rounds | 280 | 232 | Ideguchi,Tischhauser,Preneel |
| collision | 224,256 | 4 rounds | 264 | 264 | Mendel,Rechberger,Schläffer,Thomsen |
| collision | 224,256 | 3 rounds | 264 | - | Mendel,Rechberger,Schläffer,Thomsen |
| collision | 384,512 | 5 rounds | 2176 | 264 | Mendel,Rechberger,Schläffer,Thomsen |
| collision | 384,512 | 4 rounds | 264 | 264 | Mendel,Rechberger,Schläffer,Thomsen |
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 |
| semi-free-start collision | compression function | 224,256 | 8 rounds | 2192 | 264 | Ideguchi,Tischhauser,Preneel |
| distinguisher | permutation | 224,256 | 7 rounds | 219 | - | Ideguchi,Tischhauser,Preneel |
| distinguisher | permutation | 224,256 | 8 rounds | 264 | 264 | Ideguchi,Tischhauser,Preneel |
| distinguisher | compression function | 256 | 10 rounds | 2192 | 264 | Peyrin |
| distinguisher | compression function | 256 | 9 rounds | 280 | 264 | Peyrin |
| distinguisher | compression function | 512 | 11 rounds | 2640 | 264 | Peyrin |
| semi-free-start collision | compression function | 256 | 7 rounds | 2120 | 264 | Gilbert,Peyrin |
| distinguisher | compression function | 256 | 8 rounds | 2112 | 264 | Gilbert,Peyrin |
| distinguisher | permutation | 256 | 8 rounds | 2112 | 264 | Gilbert,Peyrin |
| semi-free-start collision | compression function | 256 | 7 rounds | 2120 | 264 | Mendel,Rechberger,Schläffer,Thomsen |
| semi-free-start collision | compression function | 384,512 | 7 rounds | 2152 | 264 | Mendel,Rechberger,Schläffer,Thomsen |
| semi-free-start collision | compression function | 224,256 | 6 rounds | 264 | 264 | Mendel,Peyrin,Rechberger,Schläffer |
| distinguisher | output transformation | 224,256 | 7 rounds | 256 | - | Mendel,Peyrin,Rechberger,Schläffer |
| distinguisher | permutation | 224,256 | 7 rounds | 255 | - | Mendel,Peyrin,Rechberger,Schläffer |
| semi-free-start collision | compression function | 256 | 6 rounds | 2120 | 264 | Mendel,Rechberger,Schläffer,Thomsen |
| semi-free-start collision | compression function | 224,256 | 5 rounds | 264 | - | Mendel,Rechberger,Schläffer,Thomsen |
| observation | hash | all | Kelsey | |||
| observation | block cipher | all | Barreto | |||
| free-start collision | compression function | all | any | 22n/3 | 22n/3 | submission document |
| pseudo-preimage | compression function | all | any | 2n | - | submission document |
Kota Ideguchi, Elmar Tischhauser, Bart Preneel - Improved Collision Attacks on the Reduced-Round Grøstl Hash Function
- ,2010
- http://eprint.iacr.org/2010/375.pdf
BibtexAuthor : Kota Ideguchi, Elmar Tischhauser, Bart Preneel
Title : Improved Collision Attacks on the Reduced-Round Grøstl Hash Function
In : -
Address :
Date : 2010
Thomas Peyrin - Improved Differential Attacks for ECHO and Grostl
- ,2010
- http://eprint.iacr.org/2010/223.pdf
BibtexAuthor : Thomas Peyrin
Title : Improved Differential Attacks for ECHO and Grostl
In : -
Address :
Date : 2010
Henri Gilbert, Thomas Peyrin - Super-Sbox Cryptanalysis: Improved Attacks for AES-like permutations
- FSE ,2010
- http://eprint.iacr.org/2009/531.pdf
BibtexAuthor : Henri Gilbert, Thomas Peyrin
Title : Super-Sbox Cryptanalysis: Improved Attacks for AES-like permutations
In : FSE -
Address :
Date : 2010
Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen - Rebound Attacks on the Reduced Grøstl Hash Function
- CT-RSA 5985:350-365,2010
- http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=128007&pCurrPk=47053
BibtexAuthor : Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen
Title : Rebound Attacks on the Reduced Grøstl Hash Function
In : CT-RSA -
Address :
Date : 2010
Florian Mendel, Thomas Peyrin, Christian Rechberger, Martin Schläffer - Improved Cryptanalysis of the Reduced Grøstl
Compression Function, ECHO Permutation and AES Block Cipher
- SAC 5867:16-35,2009
- http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=124407&pCurrPk=44420
BibtexAuthor : Florian Mendel, Thomas Peyrin, ChristianRechberger, Martin Schläffer
Compression Function, ECHO Permutation and AES Block Cipher
Title : Improved Cryptanalysis of the Reduced Grøstl
In : SAC -
Address :
Date : 2009
Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen - The Rebound Attack: Cryptanalysis of Reduced Whirlpool and Grøstl
- FSE 5665:260-276,2009
- http://online.tu-graz.ac.at/tug_online/voe_main2.getVollText?pDocumentNr=124409&pCurrPk=40943
BibtexAuthor : Florian Mendel, Christian Rechberger, Martin Schläffer, Søren S. Thomsen
Title : The Rebound Attack: Cryptanalysis of Reduced Whirlpool and Grøstl
In : FSE -
Address :
Date : 2009
John Kelsey - Some notes on Grøstl
- ,2009
- http://ehash.iaik.tugraz.at/uploads/d/d0/Grostl-comment-april28.pdf
BibtexAuthor : John Kelsey
Title : Some notes on Grøstl
In : -
Address :
Date : 2009
Paulo S. L. M. Barreto - An observation on Grøstl
