This seems a bit harsh, perhaps. Bletchley park was still in the minds of many people. It would have been conventional wisdom to keep this stuff away from "bad guys". Recall, gps was spoofed at this stage as well for civilian purposes. The other issue--although perhaps unsaid--is that ultimately this may have hastened tactics to make HW unsecure, and to collect undisclosed/zero day expoits in widespread SW and other things that could compromise a comms system that was perceived to be secure.