January 6, 2021 Outline

Reading: text, §2, 3.1–3.2
Due: Homework #1, due January 22; Project selection, due January 22

1. Access control matrix and entities
   1. Example: Boolean expressions
   2. Example: History and limiting rights

2. Primitive operations
   1. enter r into A[s, o]
   2. delete r from A[s, o]
   3. create subject s (note that ∀x [ A[s′, x] = A[x, s′] = ∅ ])
   4. create object o (note that ∀x [ A[x, o′] = ∅] )
   5. destroy subject s
   6. destroy object o

3. Commands and examples
   1. Regular command: create•file
   2. Mono-operational command: make•owner
   3. Conditional command: grant•rights
   4. Biconditional command: grant•read•if•r•and•c
   5. Doing “or” of 2 conditions: grant•read•if•r•or•c
   6. General form

4. Miscellaneous points
   1. Copy flag and right
   2. Own as a distinguished right
   3. Principle of attenuation of privilege

Matt Bishop Office: 2209 Watershed Sciences Phone: +1 (530) 752-8060 Email: mabishop@ucdavis.edu

ECS 235B, Foundations of Computer and Information Security Version of January 6, 2021 at 10:54PM

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