Dangers of public key?

If I hand off my public key to a client who is a Notes house, we can get encrypted communications - but what are the problems with that? How do we revoke the key if necessary?

Two answers:

1) You can change the public key for your Notes ID at any time. From the Notes client, use the feature File / Tools / User ID / More Options / New Public Key. Notes will generate a new public key for your ID, and direct you to send it to the Domino administrator to recertify.

2) There is little danger in people having your public key. That is the purpose of the key and the reason it is "public". Your public key is used to create messages that can only be decrypted by you. In other words, to send you secret messages. Your public key cannot be used to read (decrypt) secret messages sent to you -- to do this someone needs your private key.