Re: Added hashes.

Kristian Gjøsteen <kristiag+news@item.ntnu.no> wrote:

> >I'd not xor the result but keep both results (e.g. append hash 1 to hash
> >2). So if somebody is able to produce a plaintext for hash 1 (say MD5),
> >chances should be very low that it also matches hash 2 (say SHA1). But I
> >would only consider this for long-time archiving.
> >
> >This should[1] also significantly lower the probability of a hash
> >collision.
> >
> >[1] read "sounds logical to me but I'm not a cryptologist."
>
> This piece of folklore was proven false by "Multicollisions in
> Iterated Hash Functions. Application to Cascaded Constructions" by
> Antoine Joux.
>
> The paper is very easy to understand and a nice read.

And hard to get... :-( Could someone please summarize the main points?

Bye, Tino.
Received on Fri Dec 23 20:09:40 2005