Privacy-enhanced deniable authentication e-mail service

Ju Hee Ki, Jung Yeong Hwang, Dae Hun Nyang, Dong Hoon Lee, Jongin Lim

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

4 Scopus citations


E-mail brings us lots of conveniences. Especially with help of PGP and S/MIME, it gives both confidentiality and message/origin authentication. However, in some cases for strong privacy, a message sender will not want to let others know even the fact that he sent a message to a recipient. Very recently, Harn and Ren proposed a fully deniable authentication scheme for E-mail where a sender can repudiate his or her signature. In this paper, however, their deniable authentication scheme is proved not to be fully deniable. To resolve this deniability problem, we suggest a designated verifier signature scheme to support strong privacy, and construct a privacy-enhanced deniable authentication E-mail scheme using the designated verifier signature scheme. Compared with the Harn and Ren's scheme, the proposed scheme has a simple cryptographic structure and can be easily realized with the existing secure E-mail systems.

Original languageEnglish
Title of host publicationDigital Enterprise and Information Systems - International Conference, DEIS 2011, Proceedings
Number of pages14
StatePublished - 2011
EventInternational Conference on Digital Enterprise and Information Systems, DEIS 2011 - London, United Kingdom
Duration: 20 Jul 201122 Jul 2011

Publication series

NameCommunications in Computer and Information Science
Volume194 CCIS
ISSN (Print)1865-0929


ConferenceInternational Conference on Digital Enterprise and Information Systems, DEIS 2011
Country/TerritoryUnited Kingdom


  • Anonymity
  • Deniable Authentication
  • E-mail
  • Strong Designated Verifier Signature
  • authentication


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