Is a secret key compromised by known cleartext?

[Johan Wevers]

tito@rumford.de 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:
johanw@vulcan.xs4all.nl   //  http://www.xs4all.nl/~johanw/index.html
PGP/GPG public keys at http://www.xs4all.nl/~johanw/pgpkeys.html