August 19, 2005

SHA-1 compromised further

Crypto researchers have discovered a new, much faster, attack against the widely-used SHA-1 hashing algorithm. Xiaoyun Wang, one of the team of Chinese cryptographers that demonstrated earlier attacks against SHA-0 and SHA-1, along with Andrew Yao and Frances Yao, have discovered a way to produce a collision in SHA-1 over just 263 hash operations compared to 269 hash operations previously. A brute force attack should take 280 operations.



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