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      Contour: A Practical System for Binary Transparency

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          Abstract

          Transparency is crucial in security-critical applications that rely on authoritative information, as it provides a robust mechanism for holding these authorities accountable for their actions. A number of solutions have emerged in recent years that provide transparency in the setting of certificate issuance, and Bitcoin provides an example of how to enforce transparency in a financial setting. In this work we shift to a new setting, the distribution of software package binaries, and present a system for so-called "binary transparency." Our solution, Contour, uses proactive methods for providing transparency, privacy, and availability, even in the face of persistent man-in-the-middle attacks. We also demonstrate, via benchmarks and a test deployment for the Debian software repository, that Contour is the only system for binary transparency that satisfies the efficiency and coordination requirements that would make it possible to deploy today.

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          Majority Is Not Enough: Bitcoin Mining Is Vulnerable

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            Keeping Authorities "Honest or Bust" with Decentralized Witness Cosigning

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              Catena: Efficient Non-equivocation via Bitcoin

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                Author and article information

                Journal
                22 December 2017
                Article
                1712.08427
                c62d6c2d-c2e3-4a4a-9960-671738091e2a

                http://arxiv.org/licenses/nonexclusive-distrib/1.0/

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