Military Security - How to Prevent Friendly Fire
This paper takes a look at the various systems available for prevention of friendly fire, and seeks to perform a preliminary analysis of them.
Encryption authentication systems, public key vs private key, mathematical proofs of systems. Also, consider Communications Security, the partial document/thoughts put together by Ryan.
Effectiveness of standard counter-intelligence techniques in digital age....
Aggregate collections of data to commanders, detailed local data to troops, etc... Some of the selection criteria involved.