Microsoft SQL Server 2000 TCSEC Class C2 Certification
Microsoft SQL Server 2000 was validated against the DoD/NSA NCSC Trusted Computer System Evaluation Criteria (TCSEC). Its rating was Class C2. This kind of security evaluation was a predecessor to the Common Criteria (CC). Unfortunately, the DoD/NSA CSS NCSC TPEP/TTAP web site is no longer in service so I can’t direct you to the Final Evaluation Report.
More information about Microsoft SQL Server 2000 and Class C2:
https://technet.microsoft.com/en-us/library/dd277389.aspx
The Microsoft SQL Server 2000 C2 Admin and User Guide: