Clearly, PBS has specific security advantages over user-based systems in today’s Internet environment. Malicious programs like worms and Trojan horses are the scourge of today’s Internet. By limiting system access to known (trusted) processes, and by limiting the scope of that access to only what is necessary for the process to function, PBS can stop the execution of malicious programs. And since the PBS security model has all program access pre-determined, the need for constant security patching is eliminated.

Trojan horses, viruses and worms cannot function in a PBS environment. Further, spammers cannot take control of an SMTP mail server, nor can the system be used as a “zombie” for distributed denial of service attacks.

SAGE FIRST, Inc. has proven the PBS operating system principles in a secure web appliance, BRICKServer®2. It includes a web server, SMTP and POP3 mail, plus ftp services. The system has withstood the rigors of penetration testing by Sandia National Laboratories, the U.S. Army, various system integrators, and countless hackers since it’s availability.