C2

   One of a series of seven levels of computer security defined by the National Security Agency.

   C2-level security requires that users are logged in and tracked during their session, that all resources have owners, that objects such as files be protected from processes that might damage them, that events can be audited, and that the system has adequate protection against intrusion.

   C2 security applies to a stand-alone system, so in theory a networked computer cannot be C2-compliant; following the guidelines can certainly help you to set up a more secure system.