Digital Signatures for e-Government - A Long-Term Security Architecture

  • Przemysław Błaśkiewicz
  • Przemysław Kubiak
  • Mirosław Kutyłowski
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 56)

Abstract

The framework of digital signature based on qualified certificates and X.509 architecture is known to have many security risks. Moreover, the fraud prevention mechanism is fragile and does not provide strong guarantees that might be regarded necessary for flow of legal documents.

Recently, mediated signatures have been proposed as a mechanism to effectively disable signature cards. In this paper we propose further mechanisms that can be applied on top of mediated RSA, so that we obtain signatures compatible with the standard format, but providing security guarantees even in the case when RSA becomes broken or the keys are compromised. Our solution is well suited for deploying a large-scale, long-term digital signature system for signing legal documents. Moreover, the solution is immune to kleptographic attacks as only deterministic algorithms are used on user’s side.

Keywords

mRSA PSS padding signatures based on hash functions kleptography deterministic signatures pairing based signatures 

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Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2011

Authors and Affiliations

  • Przemysław Błaśkiewicz
    • 1
  • Przemysław Kubiak
    • 1
  • Mirosław Kutyłowski
    • 1
  1. 1.Institute of Mathematics and Computer ScienceWrocław University of TechnologyPoland

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