A1 security is a security rating for evaluating
the security of computer products to be used within government and military
organizations. The rating was developed by the U.S. National Computer Security
Center (NCSC) as an integral part of the Trusted Computer System Evaluation
Criteria (TESC), Department of Defense (DoD) standard 5200.28-STD.
A1 security was initially part of a series
included various levels of security ratings devised specifically for all types
of computer products consumed in strategically sensitive organizations. A1
security is the highest achievable rating within this qualification test. A1
security requires that any computer system must pass a series of tests of its
design, engineering, security policy models, data labeling and other
military-class security design tests. Systems that meet A1 security standards
are also referred to as having a verified design, where the underlying system
functionality is comprehensively analyzed and verified from top-level
specifications to ensure its security.
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