Revocation and non-repudiation : when the first destroys the latter

J. Braun, F. Kiefer, A.T. Hülsing

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)
1 Downloads (Pure)

Abstract

Electronic signatures replace handwritten signatures in electronic processes. In this context, non-repudiation is one of the most desired properties – yet in practice it cannot be provided by the signature schemes themselves. Therefore, additional mechanisms in the underlying public key infrastructure are required. In this work, we present a formal treatment of that issue. We extend the formal model for public key infrastructures by Maurer introducing transitions to make it dynamic. We use the extended model to evaluate the relationship between non-repudiation and revocation and prove that backdated revocation always destroys the non-repudiation property. We prove that forward secure signatures can be used to maintain non-repudiation, rendering the costly use of time-stamping – as required by all existing solutions – superfluous. We also show how to realize this in practice, introducing a new index reporting protocol. Moreover, we show how this protocol can be used to support detection of malicious key usage, thereby improving the overall security of electronic signing. Besides, the index reporting protocol allows for a convenient realization of pay per use models for certificate pricing.
Original languageEnglish
Title of host publicationPublic Key Infrastructures, Services and Applications (10th European Workshop, EuroPKI 2013, Egham, UK, September 12-13, 2013, Revised Selected Papers)
EditorsS. Katsikas, I. Agudo
Place of PublicationBerlin
PublisherSpringer
Pages31-46
ISBN (Print)978-3-642-53996-1
DOIs
Publication statusPublished - 2014
Eventconference; 10th European Workshop on Public Key Infrastructures, Services and Applications; 2013-09-12; 2013-09-13 -
Duration: 12 Sep 201313 Sep 2013

Publication series

NameLecture Notes in Computer Science
Volume8341
ISSN (Print)0302-9743

Conference

Conferenceconference; 10th European Workshop on Public Key Infrastructures, Services and Applications; 2013-09-12; 2013-09-13
Period12/09/1313/09/13
Other10th European Workshop on Public Key Infrastructures, Services and Applications

Fingerprint

Dive into the research topics of 'Revocation and non-repudiation : when the first destroys the latter'. Together they form a unique fingerprint.

Cite this