Chapter

Computer Security – ESORICS 2009

Volume 5789 of the series Lecture Notes in Computer Science pp 53-68

Type-Based Analysis of PIN Processing APIs

  • Matteo CentenaroAffiliated withDipartimento di Informatica, Università Ca’ Foscari Venezia
  • , Riccardo FocardiAffiliated withDipartimento di Informatica, Università Ca’ Foscari Venezia
  • , Flaminia L. LuccioAffiliated withDipartimento di Informatica, Università Ca’ Foscari Venezia
  • , Graham SteelAffiliated withLSV, ENS Cachan & CNRS & INRIA

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Abstract

We examine some known attacks on the PIN verification framework, based on weaknesses of the security API for the tamper-resistant Hardware Security Modules used in the network. We specify this API in an imperative language with cryptographic primitives, and show how its flaws are captured by a notion of robustness that extends the one of Myers, Sabelfeld and Zdancewic to our cryptographic setting. We propose an improved API, give an extended type system for assuring integrity and for preserving confidentiality via randomized and non-randomized encryptions, and show our new API to be type-checkable.