Is a secret key compromised by known cleartext?

Johan Wevers
Sat May 31 13:17:02 2003 wrote:

> If I got an email with a message in cleartext immediately 
> followed by the same message encrypted to my public key -- 
> would that change the status of my secret key (being secret) 
> abruptly to "being well known"?

No, the algorithms used in gpg are not sensible to this type of
attack, which is known as a known-plaintext attack.

ir. J.C.A. Wevers         //  Physics and science fiction site:   //
PGP/GPG public keys at