Project Guardian

Project Guardian

(project, security)A project which grew out of the ARPAsupport for Multics and the sale of Multics systems to theUS Air Force. The USAF wanted a system that could be used tohandle more than one security classification of data at atime. They contracted with Honeywell and MITRE Corporation to figure out how to do this. Project Guardianled to the creation of the Access Isolation Mechanism, theforerunner of the B2 labeling and star property support inMultics. The DoD Orange Book was influenced by theexperience in building secure systems gained in ProjectGuardian.