Bell, David Elliott2013-02-072013-02-072012-09-24David Elliott Bell, OH 411. Oral history interview by Jeffrey R. Yost, 24 September 2012, Reston, VA. Charles Babbage Institute, University of Minnesota, Minneapolis. http://purl.umn.edu/144024OH 411https://hdl.handle.net/11299/144024Transcript, 78 pp.David Elliott Bell is a mathematician and computer security pioneer who co-developed the highly influential Bell-LaPadula security model. This interview discusses the context of his pivotal computer security work at MITRE Corporation, and his later contributions at the National Security Agency and Trusted Information Systems (including his leadership on TIS’s Trusted Xenix B2-rated system). This material is based upon work supported by the National Science Foundation under Grant No. 1116862, “Building an Infrastructure for Computer Security History.”en-USComputer historyBell-LaPadula ModelMITRE CorporationNational Security Agency (NSA)Computer securityTrusted Information Systems, Inc.TCSEC (The Orange Book)Biba Security ModelBell, David ElliottOral History