SecureTier is a patented technology used by GlobalCerts to connect all our customers together in one big network of secured users. It is a distributed repository that stores all users' public certificates. This technology allows for all GlobalCerts customers to automatically send encrypted emails to any Globalcerts customer by discovering and using the recipient's public certificate to encrypt the message. When the message is received by the recipient's email systems, it is passed through their SecureMail Gateway, which automatically decrypts the message and passes it along to the recipient's mailbox.
For more information about SecureTier please check out the attached whitepaper.