Lesson plan
Hyperproperty
In computer science, hyperproperties are a formalism for describing properties of computational systems. Hyperproperties generalize safety and liveness properties, and can express properties such as non-interference and observational determinism. Elaborating on the example of non-interference: Non-interference can't be represented as a "property" in the formal sense because there's no inclusion-test that could be applied to a single program trace; non-interference is an assertion about how neighboring traces are similar to each other and it does no good to look at one trace at a time. "Hyperproperties" are the extension from properties as predicates on traces to properties as relations between traces.
Article summary
In computer science, hyperproperties are a formalism for describing properties of computational systems. Hyperproperties generalize safety and liveness properties, and can express properties such as non-interference and observational determinism. Elaborating on the example of non-interference: Non-interference can't be represented as a "property" in the formal sense because there's no inclusion-test that could be applied to a single program trace; non-interference is an assertion about how neighboring traces are similar to each other and it does no good to look at one trace at a time. "Hyperproperties" are the extension from properties as predicates on traces to properties as relations between traces.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.