There are actually two public keys?

James P. Howard, II jh at
Sun May 17 02:37:30 CEST 2009

On Sat May 16 18:41:56 2009, Robert J. Hansen <rjh at> wrote:

> There are two keypairs.  One keypair is used for signing, and the other
> is used for encrypting.  The private part of the signing keypair is used
>  to generate signatures; the public part is used to verify them.
> Likewise, the private part of the encryption keypair is used to decrypt
> documents; the public part is used to encrypt them.

Can anyone explain why there is a difference between signing and
encrypting keypairs, even for the same type (RSA)?


James P. Howard, II, MPA
jh at

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