[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: key-ed MD5 again

To: Bill.Simpson@um.cc.umich.edu (William Allen Simpson)
Subject: Re: key-ed MD5 again
From: Masataka Ohta <mohta@necom830.cc.titech.ac.jp>
Date: Tue, 28 Mar 95 12:52:33 JST
Cc: IPSEC@ans.net
In-Reply-To: <199503271507.AA20586@interlock.ans.net>; from "William Allen Simpson" at Mar 27, 95 2:48 pm

> Some significant analysts think that a single key at the beginning of
> MD5 does not provide enough key material when the text is long.  The
> MD5(key,MD5(text)) was suggested to improve the effect of the key in the
> final hash.

Are there any reference of the analysis?

As MD5 is a chain of addition, a transitive 1-to-1 mapping, of
hashed values, it is unlikely that the initial scrambling effect
by the added hased key is weakened later.

							Masataka Ohta

References:

Re: key-ed MD5 again

From: "William Allen Simpson" <Bill.Simpson@um.cc.umich.edu>

Prev by Date: Re: fast DES information
Next by Date: Re: key-ed MD5 again
Prev by thread: Re: key-ed MD5 again
Next by thread: Re: key-ed MD5 again
Index(es):
- Main
- Thread