Difference between revisions of "AURORA"
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| style="background:yellow" | collision || hash || 512 || || 2<sup>236</sup> || 2<sup>236</sup> || [http://eprint.iacr.org/2009/106.pdf Sasaki] | | style="background:yellow" | collision || hash || 512 || || 2<sup>236</sup> || 2<sup>236</sup> || [http://eprint.iacr.org/2009/106.pdf Sasaki] | ||
|- | |- | ||
| + | | | key-recovery || HMAC || 512 || || 2<sup>259</sup> || - || [http://eprint.iacr.org/2009/125.pdf Sasaki] | ||
| + | |- | ||
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url ={http://eprint.iacr.org/2009/106.pdf}, | url ={http://eprint.iacr.org/2009/106.pdf}, | ||
abstract = { In this note, we present a collision attack on AURORA-512, which is one of the candidates for SHA-3. The attack complexity is approximately $2^{236}$ AURORA-512 operations, which is less than the birthday bound of AURORA-512, namely, $2^{256}$. Our attack exploits some weakness in the mode of operation.}, | abstract = { In this note, we present a collision attack on AURORA-512, which is one of the candidates for SHA-3. The attack complexity is approximately $2^{236}$ AURORA-512 operations, which is less than the birthday bound of AURORA-512, namely, $2^{256}$. Our attack exploits some weakness in the mode of operation.}, | ||
| + | } | ||
| + | </bibtex> | ||
| + | |||
| + | <bibtex> | ||
| + | @misc{cryptoeprint:2009:125, | ||
| + | author = {Yu Sasaki}, | ||
| + | title = {A Full Key Recovery Attack on HMAC-AURORA-512}, | ||
| + | howpublished = {Cryptology ePrint Archive, Report 2009/125}, | ||
| + | year = {2009}, | ||
| + | note = {\url{http://eprint.iacr.org/}}, | ||
| + | abstract = {In this note, we present a full key recovery attack on HMAC-AURORA-512 when 512-bit secret keys are used and the MAC length is 512-bit long. Our attack requires $2^{257}$ queries and the off-line complexity is $2^{259}$ AURORA-512 operations, which is significantly less than the complexity of the exhaustive search for a 512-bit key. The attack can be carried out with a negligible amount of memory. Our attack can also recover the inner-key of HMAC-AURORA-384 with almost the same complexity as in HMAC-AURORA-512. This attack does not recover the outer-key of HMAC-AURORA-384, but universal forgery is possible by combining the inner-key recovery and 2nd-preimage attacks. Our attack exploits some weaknesses in the mode of operation. } | ||
} | } | ||
</bibtex> | </bibtex> | ||
Latest revision as of 11:26, 27 March 2009
1 The algorithm
- Author(s): Tetsu Iwata, Kyoji Shibutani, Taizo Shirai, Shiho Moriai, Toru Akishita
- Website: http://www.sony.net/aurora/
- NIST submission package: AURORA.zip
Tetsu Iwata, Kyoji Shibutani, Taizo Shirai, Shiho Moriai, Toru Akishita - AURORA: A Cryptographic Hash Algorithm Family
- ,2008
- http://ehash.iaik.tugraz.at/uploads/b/ba/AURORA.pdf
BibtexAuthor : Tetsu Iwata, Kyoji Shibutani, Taizo Shirai, Shiho Moriai, Toru Akishita
Title : AURORA: A Cryptographic Hash Algorithm Family
In : -
Address :
Date : 2008
2 Cryptanalysis
| Type of Analysis | Hash Function Part | Hash Size (n) | Parameters/Variants | Compression Function Calls | Memory Requirements | Reference |
| 2nd preimage | hash | 512 | 2291 | 231.5 | Ferguson, Lucks | |
| collision | hash | 512 | 2249 | - | Ferguson, Lucks | |
| collision | hash | 512 | 2234.5 | 2229.6 | Ferguson, Lucks | |
| 2nd preimage | hash | 512 | 2291 | 2288 | Sasaki | |
| collision | hash | 512 | 2236 | 2236 | Sasaki | |
| key-recovery | HMAC | 512 | 2259 | - | Sasaki |
A description of this table is given here.
Niels Ferguson, Stefan Lucks - Attacks on AURORA-512 and the Double-Mix Merkle-Damgaard Transform
- ,2009
- http://eprint.iacr.org/2009/113.pdf
BibtexAuthor : Niels Ferguson, Stefan Lucks
Title : Attacks on AURORA-512 and the Double-Mix Merkle-Damgaard Transform
In : -
Address :
Date : 2009
Yu Sasaki - A 2nd-Preimage Attack on AURORA-512
- ,2009
- http://eprint.iacr.org/2009/112.pdf
BibtexAuthor : Yu Sasaki
Title : A 2nd-Preimage Attack on AURORA-512
In : -
Address :
Date : 2009
Yu Sasaki - A Collision Attack on AURORA-512
- ,2009
- http://eprint.iacr.org/2009/106.pdf
BibtexAuthor : Yu Sasaki
Title : A Collision Attack on AURORA-512
In : -
Address :
Date : 2009
Yu Sasaki - A Full Key Recovery Attack on HMAC-AURORA-512
