Online-Untransferable Signatures

  • Moses Liskov
  • Silvio Micali
Conference paper

DOI: 10.1007/978-3-540-78440-1_15

Volume 4939 of the book series Lecture Notes in Computer Science (LNCS)
Cite this paper as:
Liskov M., Micali S. (2008) Online-Untransferable Signatures. In: Cramer R. (eds) Public Key Cryptography – PKC 2008. PKC 2008. Lecture Notes in Computer Science, vol 4939. Springer, Berlin, Heidelberg


Non-transferability of digital signatures is an important security concern, traditionally achieved via interactive verification protocols. Such protocols, however, are vulnerable to “online transfer attacks” — i.e., attacks mounted during the protocols’ executions.

In this paper, we show how to guarantee online untransferability of signatures, via a reasonable public-key infrastructure and general assumptions, without random oracles. Our untransferable signatures are as efficient as prior ones that provably provide weaker types of untransferability.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Moses Liskov
    • 1
  • Silvio Micali
    • 2
  1. 1.Computer Science DepartmentThe College of William and MaryWilliamsburgUSA
  2. 2.Massachusetts Institute of TechnologyCSAILCambridgeUSA