Re: How about MD5(NewHash(DATA))?

From: JiXian Yang (
Date: 10/31/04

Date: 31 Oct 2004 09:52:34 -0600

Tom St Denis <> wrote:

>Why does this question come up every 6 months.
>Why would you think MD5 o MD5 would be stronger than MD5 [supposedly
>against finding collisions, though you could have meant against inversion]

An MD5 collision can be found in a matter or hours.
In, you can find the report.
It shows that finding a collision is not necessary to scan all the MD5
dictionary but to change the special bits when we have known the input.
So we must update MD5.
I wonder if MD5(NewHash(DATA)) is stronger than NewHash(DATA) when
NewHash(DATA) used the same quantity of bits.

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