Tunnels accelerate MD5 collisions

[vlastimil.klima at volny.cz]

Hi all,
according to my paper "Tunnels in Hash Functions: MD5 Collisions
Within a Minute" I programmed tunnels for searching the second
block of MD5 collision message also. In the zero version of the
program I used tunnels only in the first block to demonstrate the
method.

It took 23 seconds, now it takes 1 second. Together with the first
block (optimized from 60 s. to 30 s.) it generates a MD5 collision
per 31 seconds in average (slow notebook Acer, Pentium, 1.6 GHz).
The paper, source code and Windows exe is available on
http://cryptography.hyperlink.cz/MD5_collisions.html

regards,
Vlastimil Klima
http://cryptography.hyperlink.cz/



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