### Abstract

This is a formalization of bounded-deducibility security (BD security), a flexible notion of information-flow security applicable to arbitrary transition systems. It generalizes Sutherland's classic notion of nondeducibility by factoring in declassification bounds and trigger, whereas nondeducibility states that, in a system, information cannot flow between specified sources and sinks, BD security indicates upper bounds for the flow and triggers under which these upper bounds are no longer guaranteed.

### License

BSD License

### History

August 12, 2021
  Generalised BD Security from I/O automata to nondeterministic transition systems, with the former retained as an instance of the latter (renaming locale BD_Security to BD_Security_IO). Generalise unwinding conditions to allow making more than one transition at a time when constructing alternative traces. Add results about the expressivity of declassification triggers vs. bounds, due to Thomas Bauereiss (added as author).

### Topics

- Computer science/Security

### Session Bounded_Deducibility_Security

- Trivia
- Filtermap
- Transition_System
- IO_Automaton
- Abstract_BD_Security
- BD_Security_TS
- BD_Security_IO
- BD_Security_Triggers
- BD_Security_Unwinding
- Compositional_Reasoning
- Bounded_Deducibility_Security

### Used by

- CoCon: A Confidentiality-Verified Conference Management System
- Compositional BD Security
- CoSMed: A confidentiality-verified social media platform

## Cite

×

Bounded_Deducibility_Security-AFP

    @article{Bounded_Deducibility_Security-AFP,
      author  = {Andrei Popescu and Peter Lammich and Thomas Bauereiss},
      title   = {Bounded-Deducibility Security},
      journal = {Archive of Formal Proofs},
      month   = {April},
      year    = {2014},
      note    = {\url{https://isa-afp.org/entries/Bounded_Deducibility_Security.html},
                 Formal proof development},
      ISSN    = {2150-914x},
    }

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