a trusted computer system that offers linux ® compatibility and supports contemporary hardware speeds . it is designed to require no porting of common applications which run on linux , to be easy to develop for , and to allow the use of a wide variety of modern development tools . the system is further designed to meet or exceed the common criteria eal - 5 or higher rating through incorporation of required security features , as well as a very high level of assurance for handling data at a wide range of sensitivity levels in a wide range of operational environments . this is achieved through the implementation of a well - layered operating system which has been designed from the ground up to enforce security , but which also supports linux operating system functions and methods .