http://diggy.i2p/articles/claws.xhtml
On the other hand - if it's weak (either too short, made up of common words, or personal details like birth dates) - it increases the possibility of cracking. You've now managed to create two keys - public and private. The former allows other people to send encrypted messages to you. You're supposed to share the public key either through your website, a keyserver or directly with the people you talk to.