Case Study – National Security Agency

We designed a ruggedized classified shipboard uplink/downlink encryption unit for use by the National Security Agency for secure tactical command communications. The unit was designed, fabricated and tested within an aggressive 90 day hard deadline and passed all TEMPEST and environmental requirements.


The unit must withstand the rigors of a flight or shipboard environment and provide quick access to the internal electronics. The chassis needs to be rack mounted with rugged ball bearing slides and rear shear pins to withstand the rigors of a flight or shipboard environment.Our chassis is a 12 1/4 inch high, convection cooled, 19 inch rack mount, .090 thick aluminum interlocking dip brazed sheet metal TEMPEST housing. The chassis contained four separate EMI cavities which house large controller and processor oriented wiring boards, I/O connectors and electronic keys.

A removable, dip brazed top cover utilized a hollow core 1/4 inch round elastomeric EMI gasket to seal all the TEMPEST cavities but allow quick access and replacement of the control electronics.