DoD classifies information into 4 levels unclassified < confidential < secret < top secret |
These classifications are applied to information in particular areas such as GUNS MIDDLEEAST etc. |
Documents are labeled by secrecy level and area |
Individuals and programs are given clearances such as (SECRET,{WEBTECH,HPCC}) |
A human can only run a process with a security rating equal or below that of human |
A process can only read information marked with a security level equal to or below that of process |
A process can only write information information with a security level equal to or above that of process. |