Tech talk: Toward Extracting Monadic Programs from Proofs

abstract: The Curry-Howard Isomorphism motivates the well known proofs-as-programs interpretation. Under that interpretation, sufficiently different proofs yield different programs. This work is a step toward extracting monadic programs from proofs. In working with the list monad as a motivating example, we discovered that the standard type bind (M a -> (a -> M b) -> […]

Read More

Tech talk: Designing a practical dependently typed language

abstract: The last decade has seen many success stories for verified programming with dependent types, including the CompCert verified C compiler, verified libraries for concurrency and security, and machine-checked proofs of results like the four color theorem and the Feit-Thompson theorem. Despite these successes, dependently typed languages are rarely used for day-to-day programming tasks. In […]

Read More

Tech talk: Evidence-based Trust of Symbolic Execution-based Verification

abstract: Software-dependent critical systems that impact daily life are rapidly increasing in number, size, and complexity. Unfortunately, inadequate software and systems engineering can lead to accidents that cause economic disaster, injuries, or even death. There is a growing reliance on development and verification tools to reduce costs, better manage complexity, and to increase confidence in […]

Read More

Tech Talk: Viper: Verification Infrastructure for Permission-based Reasoning

abstract: Modern verification techniques are becoming ever-more powerful and sophisticated, and building tools to implement them is a time-consuming and difficult task. Writing a new verifier to validate each on-paper approach is impractical; for this reason intermediate verification languages such as Boogie and Why3 have become popular over the last decade for implementing research from […]

Read More

Tech talk: A Brief History of Verifiable Elections

abstract: Since the ideas were first published in 1981, verifiable election technologies have undergone decades of research successes and deployment failures. This talk will trace the history of these technologies, their evolution, and the practical challenges that they have faced. We’ll then look forward at the potential for near-term successes and the public benefits that […]

Read More

Tech talk: An Overview of Emerging Cybersecurity Policy and Law

slides: goo.gl/MtQmas abstract: Why is cybersecurity such a hard problem? The US government, its citizens, and the organizations that write software are all on the same team, but in many cases, our interests are just not aligned. For instance, there have been endless political and social disagreements about the best way to share cyber threat […]

Read More

Tech talk: The CH2O project: making sense of the C standard

abstract: CH2O is the PhD project of Robbert Krebbers and has as its goal a formal version of the ISO standard of the C programming language. A problem with this is that the C standard is fundamentally inconsistent. There are three versions of the CH2O semantics: a (small step) operational semantics, an executable semantics, and […]

Read More