A forward-secure e-mail protocol without certificated public keys

Authors:
Jeong Ok Kwon;Ik Rae Jeong;Dong Hoon Lee
Affiliations:
Information Security Center, Samsung SDS, Seocho 2-dong, Seocho-gu, 137-857 Seoul, Republic of Korea;Graduate School of Information Security, CIST, Korea University, 1, 5-Ka, Anam-dong Sungbuk-ku, 136-701 Seoul, Republic of Korea;Graduate School of Information Security, CIST, Korea University, 1, 5-Ka, Anam-dong Sungbuk-ku, 136-701 Seoul, Republic of Korea
Venue:
Information Sciences: an International Journal
Year:
2009

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Abstract

Forward secrecy in an e-mail system means that compromising of the long-term secret keys of the mail users and mail servers does not affect the confidentiality of the e-mail messages. Previous forward-secure e-mail protocols used the certified public keys of the users using PKI (Public Key Infrastructure). In this paper, we propose a password-based authenticated e-mail protocol providing forward secrecy. The proposed protocol does not require certified public keys and is sufficiently efficient to be executed on resource-restricted mobile devices.