. CHAINIAC: Proactive Software-Update Transparency via Collectively Signed Skipchains and Verified Builds. In Usenix Security Symposium, 2017.

Details PDF Slides Video Code Cryptology ePrint Blog Post

. Scalable bias-resistant distributed randomness. In IEEE S&P, 2017.

Details PDF Slides Video Code Cryptology ePrint

. Managing Identities Using Blockchains and CoSi. In HotPETs, 2016.

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. Enhancing Bitcoin Security and Performance with Strong Consistency via Collective Signing. In USENIX Security Symposium, 2016.

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. Keeping Authorities “Honest or Bust” with Decentralized Witness Cosigning. In IEEE S&P, 2016.

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Selection of Recent Collaborations


CONIKS is a key management system for end users.

Key Transparency

Google’s reply to CONIKS.


A scalable collective authority framework.