> then how SHA/MD5 Combination or any custom signatures will be implemented?
I'm not sure I understand your question..
Date: Thu, 14 Sep 2006 04:35:11 -0700
From: [EMAIL PROTECTED]
Subject: RE: SHA/MD5 Combination
To: [email protected]
Hi Sørenthen how SHA/MD5 Combination or any custom signatures will be implemented?RegardsHaytham Mohammed
Søren Dreijer <[EMAIL PROTECTED]> wrote:Have a look here:
http://www.eskimo.com/~weidai/cgi-bin/fom-serve/cache/96.html
Date: Wed, 13 Sep 2006 05:22:48 -0700
From: [EMAIL PROTECTED]
Subject: Re: SHA/MD5 Combination
To: [email protected]
Hi allDoes the library support asymmetric encryption using private key in RSA?RegardsHaytham Mohammed
Jakub <[EMAIL PROTECTED]> wrote:
Yes, Mohammed, I want to prevent the colisions. MD5 is not as resistant as
SHA-1, while co-author of SHA-1 is NSA, so we are not 100% sure, if they
have this alg. cracked, but is good rated anyway! Crypto++ contains 2
different types, i.e. RSA-ES for encryption and RSA-SS for signature. You
say that I can use RSA-ES, that is intended for encryption and sign the
combined hash using its private key? The truth is I am not sure how to do
it...
Haytham Mohammed wrote:
>
> Hi Jakub
>
> What is your reference for this idea? (it is a creative one :) )
> I think it will be more secure since the collision resistance will be
> increased.
>
> you are going to hash the message twice
> 1-once with SHA and other with MD5
> 2-then concat the 2 hashes
> 3-then encrypt the result from 2 using your private key (using RSA)
> 4- the result from 3 is the signature :)
>
> Regards
> Haytham Mohammed
>
> Jakub wrote:
>
> Does anybody know, how to combine i.e. SHA + MD5 hashes in one signature
> (i.e. RSA)? I know that there may be 2 separated signatures, but it should
> be more secure and efficient having 2 hashes in one signature.
> Thanks, Jakub
> --
> View this message in context:
> http://www.nabble.com/SHA-MD5-Combination-tf2192153.html#a6066434
> Sent from the Crypto++ forum at Nabble.com.
>
>
>
>
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View this message in context: http://www.nabble.com/SHA-MD5-Combination-tf2192153.html#a6179915
Sent from the Crypto++ forum at Nabble.com.
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