The TrustedBSD project is an open source project developing advanced security features for the open source FreeBSD operating system, including file system extended attributes and UFS2, Access Control Lists, OpenPAM, security event auditing with OpenBSM, mandatory access control and the TrustedBSD MAC Framework, and the GEOM storage framework. Many technologies from TrustedBSD may also be found in operating systems beyond FreeBSD, including Mac OS X, NetBSD, OpenBSD, and Linux.

The TrustedBSD Project originally targeted trusted operating system functionality required by the Common Criteria for Information Technology Security Evaluation (CC). Work has gone significantly further, including research and development into operating system security extensibility, and work on local and distributed file systems as required to meet security goals. Despite significant success in developing and deploying advanced security functions on FreeBSD and elsewhere, the work of the TrustedBSD Project continues, with new and enhanced features shipping with new operating system versions.

This web site provides development information about TrustedBSD, including early access to source code and on-going development work, documentation and papers, historical information, and more. The TrustedBSD Project also hosts a number of mailing lists for discussion of on-going work as well as user support.

The TrustedBSD Project is made possible through generous sponsorship and support from a variety of organizations, including the Defence Advanced Research Projects Agency (DARPA), the National Security Agency (NSA), Network Associates Laboratories, Safeport Network Services, the University of Pennsylvania, Yahoo!, McAfee Research, SPARTA, Inc., Apple Computer, Inc., nCirce Network Security, Inc., Google, Inc., the University of Cambridge Computer Laboratory, and others. Contributions to support the TrustedBSD Project are welcome; please consider making donations through the FreeBSD Foundation.