Which rating offers the highest level of assurance?
A.
B1
B.
C2
C.
B3
D.
C1
Explanation:
TCSEC has four classifications with A being the best and D providing the least amount of protection. Within each classification are divisions of ratings with the higher numbers being the best and the lower numbers providing lower protection. So C2 would provide more protection than a system that achieved a C1 rating and a B2 would provide more protection than a B1 rating.