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Defense Message System (DMS) is a secure email system designed by the U.S. Department of Defense to transmit military messages. DMS uses the Open Systems Interconnection (OSI) model standards such as X.500 directory, X.509 public key and X.400 mail.
DMS is similar to traditional email clients. It is flexible, user-friendly and may be used with third-party messaging systems.
DMS was developed to provide a secure and integrated email system for the Department of Defense. It included advanced technology for future challenges.
DMS is made up of the following basic components: