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.

[1][2] In 1984, a research group called the Secure Computing Technology Center (SCTC) was formed at Honeywell in Minneapolis, Minnesota.

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).

Ultimately, the "challenge" portion of the challenge–response was eliminated to produce a one-time password token similar to the SecurID product.

Shortly after acquiring the Webster/SmartFilter product, Secure Computing merged with Border Network Technologies, a Canadian company selling the Borderware firewall.

TrustedSource, a reputation system that Secure Computing obtained as part of the CipherTrust acquisition, was a key technology for the company, enabling all product lines with global intelligence capability based on behavioral analysis of traffic patterns from all of company's email, web and firewall devices and hosted services, as well as those of numerous OEM partners.

TrustedSource derived real-time reputation scores of IPs, URLs, domains, and mail/web content based on a variety of data mining/analysis techniques, such as Support Vector Machine, Random forest, and Term-Frequency Inverse-Document Frequency (TFIDF) classifiers.

It provided Anti-Malware protection, TrustedSource reputation-enabled URL filtering controls, content caching, and SSL scanning capabilities.

However, interaction between Secure Computing and the open source community was spotty due to the company's ownership of patents related to Type enforcement.

Along with Sidewinder, Gauntlet had been one of the earliest application layer firewalls; both had developed a large customer base in the United States Department of Defense.

[2][6][7] In response to the company, Jonathan Zittrain, co-director of Harvard Law School's Berkman Center for Internet and Society, stated, "[T]he fact remains that the software has been in use for an extended period of time there.

"[2] In 2001 The New York Times reported that Secure Computing was one of ten companies competing for the Saudi government's contract for software to block its citizens' access to websites it deemed offensive.

[2][8] According to the OpenNet Initiative's 2007 report, the Saudi government's censorship "most extensively covers religious and social content, though sites relating to opposition groups and regional political and human rights issues are also targeted.