Messenger archive security is initially established with the archive passphrase, as described in Section 4.1, Establishing the Master Archive Agent. The passphrase enables the Archive Agent to encrypt conversations as they are saved on disk.
Secure Sockets Layer (SSL) ensures secure communication between programs by encrypting the complete communication flow between the programs. The Messenger Installation program offered the opportunity to configure the Messenger agents for SSL encryption. If you did not set up SSL encryption during installation, you can easily do so after installation. You can use the same procedure for setting up SSL encryption for the Archive Agent as for the Messaging Agent. For instructions, see Section 2.3, Establishing Messaging Security with SSL Encryption.