Privacy-enhanced deniable authentication e-mail service

JuHee Ki, Jung Yeong Hwang, DaeHun Nyang, Dong Hoon Lee, Jong In Lim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


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 publicationCommunications in Computer and Information Science
Number of pages14
Volume194 CCIS
Publication statusPublished - 2011 Sep 2
EventInternational Conference on Digital Enterprise and Information Systems, DEIS 2011 - London, United Kingdom
Duration: 2011 Jul 202011 Jul 22

Publication series

NameCommunications in Computer and Information Science
Volume194 CCIS
ISSN (Print)18650929


OtherInternational Conference on Digital Enterprise and Information Systems, DEIS 2011
CountryUnited Kingdom


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

ASJC Scopus subject areas

  • Computer Science(all)

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  • Cite this

    Ki, J., Yeong Hwang, J., Nyang, D., Lee, D. H., & Lim, J. I. (2011). Privacy-enhanced deniable authentication e-mail service. In Communications in Computer and Information Science (Vol. 194 CCIS, pp. 16-29). (Communications in Computer and Information Science; Vol. 194 CCIS).