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C2 security is a type of security rating that evaluates the security framework for computer products used in government and military organizations and institutes. The standard was conceived by the U.S. National Computer Security Center (NCSC) to create a minimum security benchmark for all computing products and applications that process confidential government and military information.
C2 security is one of several security rating levels for government and military computing products. It is primarily a C1 security enhancement that provides controlled access protection through additional security features in the login procedures. The audit trail of each user that logs into the system must be saved and retrieved when required. Moreover, C2 security also requires the protection of memory content, specifically after a process releases it, as well as in instances of exploitation and/or tampering of disk data.