What is C1 security?
C1 Security is a security rating that evaluates the security of computer products used by or within government and military organizations and institutions. It was developed by the US Computer Security Center (NCSC) and is part of the Department of Defense (DoD) standard 5200.28-STD of the Department of Defense (TESC) (or 'Orange Book').
C1 security was originally part of the Orange Book, which included various levels of assessment specifically designed for all types of computer products. C1 security requires that every computer system must have a user authentication and logon system in place in order to access data. This can be a simple user ID and password that can be shared by multiple users. It is also known as the discreet security protection process where administrators can choose who to give access to.