A method and apparatus to protect a master do-not-email list from being compromised. A set of one or more false email addresses that each point to an email account that is not used for any email is created for a client and is unique to the client. An encryption scheme is applied to the set of false email...http://www.google.de/patents/US7941842?utm_source=gb-gplus-sharePatent US7941842 - Method and apparatus for a non-revealing do-not-contact list system
