Errors Matter: Breaking RSA-Based PIN Encryption with Thirty Ciphertext Validity Queries

  • Nigel P. Smart
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5985)

Abstract

We show that one can recover the PIN from a standardized RSA-based PIN encryption algorithm from a small number of queries to a ciphertext validity checking oracle. The validity checking oracle required is rather special and we discuss whether such oracles could be obtained in the real world. Our method works using a minor extension to the ideas of Bleichenbacher and Manger, in particular we obtain information from negative, as well as positive, responses from the validity checking oracle.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Nigel P. Smart
    • 1
  1. 1.Dept. Computer ScienceUniversity of BristolBristolUnited Kingdom

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