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Deterring Certificate Subversion: Efficient Double-Authentication-Preventing Signatures

  • Mihir Bellare
  • Bertram Poettering
  • Douglas StebilaEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 10175)

Abstract

We present highly efficient double authentication preventing signatures (DAPS). In a DAPS, signing two messages with the same first part and differing second parts reveals the signing key. In the context of PKIs we suggest that CAs who use DAPS to create certificates have a court-convincing argument to deny big-brother requests to create rogue certificates, thus deterring certificate subversion. We give two general methods for obtaining DAPS. Both start from trapdoor identification schemes. We instantiate our transforms to obtain numerous specific DAPS that, in addition to being efficient, are proven with tight security reductions to standard assumptions. We implement our DAPS schemes to show that they are not only several orders of magnitude more efficient than prior DAPS but competitive with in-use signature schemes that lack the double authentication preventing property.

Keywords

Identification Scheme Signature Scheme Random Oracle Certificate Authority Passive Attack 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

We thank the authors of [17] for helpful comments about their scheme. MB was supported by NSF grants CNS-1228890 and CNS-1526801, a gift from Microsoft corporation and ERC Project ERCC (FP7/615074). BP was supported by ERC Project ERCC (FP7/615074). DS was supported in part by Australian Research Council (ARC) Discovery Project grant DP130104304 and Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery grant RGPIN-2016-05146 and an NSERC Discovery Accelerator Supplement.

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Copyright information

© International Association for Cryptologic Research 2017

Authors and Affiliations

  • Mihir Bellare
    • 1
  • Bertram Poettering
    • 2
  • Douglas Stebila
    • 3
    Email author
  1. 1.Department of Computer Science and EngineeringUniversity of California, San DiegoLa JollaUSA
  2. 2.Department of MathematicsRuhr University BochumBochumGermany
  3. 3.Department of Computing and SoftwareMcMaster UniversityHamiltonCanada

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