# Re: RSA question

*From*: Kristian Gjøsteen <kristiag+news@xxxxxxxxxxxx>*Date*: Wed, 18 Feb 2009 09:53:25 +0000 (UTC)

Greg Rose <ggr@xxxxxxxxxxxxx> wrote:

It is one of my pet peeves that people try to map

the digital signature operations of sign/verify

onto the privacy operations of decrypt/encrypt.

Writing a text book that even suggests this "duality" should be a

punishable offence.

For most public key systems the operations are

quite different,

I once heard a talk where the speaker defined signatures as "an encryption

scheme where you encrypt with the private key instead of the public key",

and then went on to note that there were some strange systems such as

DSA where you couldn't actually encrypt with the public key.

--

Kristian Gjøsteen

.

**Follow-Ups**:**Re: RSA question***From:*Mark Wooding

**References**:**RSA question***From:*sluijten

**Re: RSA question***From:*bert

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