Difference between revisions of "SHA-1"
From The ECRYPT Hash Function Website
(→State Update Transformation) |
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E_{i+1} &= D_i | E_{i+1} &= D_i | ||
\end{aligned} | \end{aligned} | ||
| + | </amsmath> | ||
| + | |||
| + | <amsmath> | ||
| + | \end{equation*} | ||
| + | \begin{equation} | ||
| + | \text{this works but if a fuck*** ugly hack } | ||
| + | a = \sum_{i=0}^{n}{2^i} | ||
| + | \end{equation} | ||
| + | \begin{equation*} | ||
</amsmath> | </amsmath> | ||
Revision as of 16:33, 11 October 2006
Contents
1 General Description
SHA-1 is an iterated hash function.
1.1 Compression Function
The compression function takes as input a 512-bit message block and a 160-bit chaining variable, and produces a 160-bit chaining value. The compression function is described as follows:
1.1.1 Message Expansion
1.1.2 State Update Transformation
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1.2 Padding Method
1.3 Initial Value and Constants
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2 Claimed Security Margins
3 Security Anaylsis
- Best know attack: <math>2^{63}</math> by Wang et.al.
- Best known collision example: 64-step collision by De Canniere and Rechberger
something like: best know attack to date: kind of attack, which variant has been looked at (e.g. round-reduced), complexity, and reference to paper and abstract.
may be make here a new page with the other cryptanalysis results.
