Today, with the increasing use of unmanned platforms to host intelligence, surveillance, and reconnaissance [ISR] sensor applications, system integrators need to ensure that the sensor systems and the critical data they collect and store are protected from falling into the wrong hands. By their very nature, unmanned platforms – whether airborne, on land, or at sea – pose more complex problems for security. All systems, regardless if deployed on manned or unmanned platforms, are now required to adhere to the Department of Defense (DoD) mandate for a Modular Open Systems Approach (MOSA). The good news for unmanned ISR system designers is that The Open Group’s SOSA [Sensor Open System Architecture] Consortium recently released Technical Standard for SOSA Reference Architecture, Edition 1.0, which defines many aspects of trusted computing for sensor systems. The SOSA standard combines MOSA principles with security to enable the rapid and affordable deployment of secure sensor systems on unmanned platforms.