Re^5: Would Like Recommendation for an SHA256 module

Finding the collision took 8 hours using a notebook PC (Intel Pentium 1.6 GHz)

Heh ... I wondered as I wrote whether I would end up with the ol' egg facial treatment. (If you hadn't provided the link, I would have assumed that collision was something you whipped up all by yourself :-)

Of course that doesn't demonstrate that a string (of a specific length) that hashes to a given digest can be found readily - which would be the OP's main concern. But, with the progress that is being made in the breaking of MD5, I think I might refrain from making any more rash assertions.

Thanks, ikegami, for the heads up.

Cheers,
Rob

Comment on Re^5: Would Like Recommendation for an SHA256 module

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Re^6: Would Like Recommendation for an SHA256 module by ikegami (Patriarch) on Aug 02, 2006 at 00:42 UTC
Fortunately for me, you asked the wrong question. Finding two strings with the same hash is a problem entirely different from the one of finding a string that hashes to a given hash. You really wanted the latter. I don't think MD5 has been broken with regards to the second problem, but attacks only get better. That's why it's time to move on to something more reliable.	[reply]