Multi-level security, mandatory access control

Security in Computing (3rd Edition)

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1 October 31, 2005 © Doug Tygar, 2005 (cs161.org) Government models of security Doug Tygar ([email protected]) October 31, 2005 cs161.org October 31, 2005 © Doug Tygar, 2005 (cs161.org) Military models of security “Need to know” Three models of security Classification unclassified, classified, secret, top secret Compartmentalization nuclear, crypto, weapons specific Discretionary access control Distribution lists October 31, 2005 © Doug Tygar, 2005 (cs161.org) What clearance means Clearance is primarily a restriction on what you can release Declassification = permission to discuss Everyday example: Non-disclosure agreements Advice: Be careful before agreeing to clearance or NDAs October 31, 2005 © Doug Tygar, 2005 (cs161.org) Two ways to rank systems How much do they protect military models of classification? What is the strength of mechanism October 31, 2005 © Doug Tygar, 2005 (cs161.org) History US Orange book (Trusted Computer Security Evaluation Criteria) TCSEC Rainbow Series Europe
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