[Default] On Thu, 23 Feb 2017 09:50:12 -0800, Marc Simpson
<[email protected]> wrote:

>This may be of interest to some here, especially in light of previous
>SHA-1 related discussions on list:
>
>  https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html

Interesting.

https://shattered.io/ says:
<citation>

Who is capable of mounting this attack?

This attack required over 9,223,372,036,854,775,808 SHA1
computations. This took the equivalent processing power as 6,500
years of single-CPU computations and 110 years of single-GPU
computations.

How does this attack compare to the brute force one?

The SHAttered attack is 100,000 faster than the brute force
attack that relies on the birthday paradox. The brute force
attack would require 12,000,000 GPU years to complete, and it is
therefore impractical. 
</citation>

-- 
Regards,
Kees Nuyt

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