Secure Computing Corporation, or SCC, was a public company (NASDAQ: SCUR) that developed and sold computer security appliances and hosted services to protect users and data. McAfee acquired the company in 2008. The company also developed filtering systems used by governments such as Iran and Saudi Arabia that blocks their citizens from accessing information on the Internet. In 1984, a research group called the Secure Computing Technology Center (SCTC) was formed at Honeywell in Minneapolis, Minnesota. The centerpiece of SCTC was its work on security-evaluated operating systems for the NSA. This work included the Secure Ada Target (SAT) and the Logical Coprocessing Kernel (LOCK), both designed to meet the stringent A1 level of the Trusted Computer Systems Evaluation Criteria (TCSEC).