Achieving evenhandedness in certified email system for contract signing

Kenji Imamoto, Jianying Zhou, Kouichi Sakurai

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Certified email is a system which enables a sender to prove a receiver's receipt of email. Such a system can be used for applications related to electronic commerce on the Internet. This paper considers a situation where a sender or a receiver wants to change his/her mind due to the change of mail content value (e.g., stock, auction, gambling) during the transaction. We point out that no traditional certified email systems have been designed for such a case, thus one of the participants can be at a disadvantage. To avoid this problem, we propose an evenhanded certified email system in which each participant can change his/her choice, either cancel or finish the transaction, at any time during the transaction.

Original languageEnglish
Pages (from-to)383-394
Number of pages12
JournalInternational Journal of Information Security
Issue number6
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Software
  • Information Systems
  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications


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