MD5 Collisions...

[Mohacsi Janos]

On Mon, 3 Dec 2007, Norberto Meijome wrote:

> Hi everyone,
>
> Not sure if you've read http://www.win.tue.nl/hashclash/SoftIntCodeSign/ .
>
> should some kind of advisory be sent to advise people not to rely solely on MD5 checksums? Maybe an update to the man page is due ? :
>
> "
> MD5 has not yet (2001-09-03) been broken, but sufficient attacks have
>     been made that its security is in some doubt.  The attacks on MD5 are in
>     the nature of finding ``collisions'' -- that is, multiple inputs which
>     hash to the same value; it is still unlikely for an attacker to be able
>     to determine the exact original input given a hash value.
> "

Some measures are already taken:
- FreeBSD ports use not only MD5 but SHA256 additionaly
- Same applied for FreeBSD ISO images

Best Regards,

Janos Mohacsi
Network Engineer, Research Associate, Head of Network Planning and Projects
NIIF/HUNGARNET, HUNGARY
Key 70EF9882: DEC2 C685 1ED4 C95A 145F  4300 6F64 7B00 70EF 9882