Unit 5-2 Multilevel Security [Compatibility Mode]

Unit 5-2 Multilevel Security [Compatibility Mode] - Unit 5...

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12/19/2010 1 Unit 5: Multilevel Security Part 2 Click Here to Start Audio Anderson Report circle5 Anderson, J.P “Computer Security Technology and Planning Study”, ESD- TR-73-51, Air Force 1972 circle5 Introduced Reference Monitors circle3 Tamperproof, Always Invoked, Small ◦ Formal Verification Landmark Formal Model circle5 Written in ‘70’s at MITRE ◦ Air Force Contract ◦ Bell, D.E and LaPadula, L.J “Secure Computer Systems: Unified Exposition and Multics Interpretation”, MTR-2997, 1976 circle5 Very Influential Impact on TCSEC circle5 Includes Discretionary Rules (ds- property)
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12/19/2010 2 Basic Security Theorem circle5 Inductive Security ◦ Secure State ◦ Rules Proven to Preserve Secure State ◦ Will Always Stay in a Secure State circle5 Examples of Non-Inductive Problems ◦ Resource Deadlock State State-Based Models Based Models circle5 “Building A Secure Computer System” Morrie Gasser ◦ Define Security-Relevant Objects ◦ Define Condition for Secure State ◦ Define Transitions
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