Security, Continued
Level I
Level I data (classified) handling requirements and procedures are similar to
those for handling hard copy classified material. You are responsible for
safeguarding this information at all times. Within Level I, the four modes of
secure electronic processing of classified data are the system high, the
dedicated, the multilevel, and the controlled mode. The following table
specifically defines the four security modes:
Mode
Definition
System high
All computers on the network and connected
peripherals protect data according to the
requirements for the highest classification category
and type of material contained in the system. This
requires a security clearance but not necessarily a
need-to-know for all material in the system.
Dedicated
Specific users or a group of users with a security
clearance and a need-to-know for the processing of a
particular type of classified material exclusively use
and control all of the computers and peripherals on a
system.
Multilevel
Various types and categories of classified material
stored and processed concurrently in a computer
system that permits selective access to material by
uncleared users and users with differing security
clearances and need-to-know. This is a function of
the operating system and associated system
software.
Controlled
A computer system in which at least some users
with access to the system have neither a security
clearance nor a need-to-know for all classified
material in the system.
Continued on next page
3-40
