Reliable network communication relies on a uniform standard for data transfer at the Application layer. Signum is a compliant implementation of MIL-STD-2045-47001 Department of Defense Interface Standard, Connectionless Data Transfer Application Layer Standard.

Applicable Standards

  • MIL-STD-2045-47001B
  • MIL-STD-2045-47001C


Signum is compatible with the U.S. Army's Improved Data Modem (IDM) and can be used to communicate with AFATDS, the Longbow Apache, and FBCB2.


Use Signum with any of the User Message Formats including Link 16, Variable Message Format (VMF), and National Imagery Transmission Format (NITFS). For systems that support XML as their message format, XML-MTF and XML-VMF are also supported.


Guarantee message delivery with acknowlegments and automatic retransmissions. Receive a confirmation that your important messages were received, all while using network resources efficiently.

Big or Small

Signum automatically segments messages when they get too big. Reassembly is transparent when receiving a message, so you can reliably transmit messages over one megabyte. Works with IPv4 or N-Layer passthrough.



Digital signatures provide authentication so you can trust the source of a message. Load a private certificate into Signum to sign any important messages, such as VMF K00.3 Security Messages. Distribute the public certificate so that recipients can authenticate messages.

MIL-STD-2045-47001 Application Header authentication