Report of collision-generation with MD5

[Poul-Henning Kamp]

In message <20040820004843.011b8de8 at piglet.goo>, Tig writes:
>On Wed, 18 Aug 2004 14:29:57 -0400
>"Peter C. Lai" <sirmoo at cowbert.net> wrote:
>
>> On Wed, Aug 18, 2004 at 09:08:12PM +0300, Claudiu wrote:
>> > hello,
>> > 
>> > please explain what do you mean by "reverse the hash". Is this the 
>> > recreation of the originial message from its hash ?
>> 
>> The short answer is yes. The slightly longer answer is that such is
>> only one specific case. The general case is that the digest should not
>> reveal any information about the original message.
>> 
>
>
>If this is the case, then it would be very cool!
>
>Imagine sending 32 bytes, then 'reverse the hash' to get XX MB's worth
>of data :]
>
>That would be great compression!

That would not be compression (and hopefully you know it).

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Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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