ZDNet UK: FBI Supplier Puts Finishing Touches on Secure Linux

“Software company Trusted Computer Solutions (TCS) is currently
beta testing a secure version of Linux, which will provide its
customers with an alternative to Trusted Solaris to run its product

“The company builds applications which allow information to be
shared securely. Edward Hammersla, chief operating officer at TCS,
told ZDNet UK that when the UK Ministry of Defense or NATO requires
a piece of US intelligence, the data is often shared using TCS