David Gray grayd at extenza-turpin.com
Tue Jan 25 16:49:03 CET 2005

Hi Mark, 

Thanks for the clarification even if it's not good news.  I guess the only
thing I can get them to do is upgrade to a newer version of PGP or use a
modified version.  


-----Original Message-----
From: Mark Kirchner [mailto:mail at mark-kirchner.de] 
Sent: 25 January 2005 12:06
To: gnupg-users
Subject: Re: 2.6.3i

Hello David,

On Tuesday, January 25, 2005, 12:50:23 PM, David wrote:
> Thanks for your response. I'm interested to read that PGP2 can use
> RSA as well as IDEA.

Well, RSA is the asymmetrical cipher that PGP2 uses, IDEA is the
symmetrical one. Doing a "normal" encryption, both are used: RSA for
encrypting the symmetrical IDEA-key (which is used to encrypt the
actual message).
So you can't encrypt a message using RSA only. (Theoretically it's
possible of course, but PGP won't do that - IIRC).

> The people at the other end of this project are saying (without too
> much conviction) that they can ONLY use IDEA.

They are right, as long as they are not using a (earlier by others
mentioned) modified Version of PGP.

Mark Kirchner

Key (0x19DC86D3): http://www.mark-kirchner.de/keys/key-mk.asc

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