TY - GEN
T1 - Privacy-enhanced deniable authentication e-mail service
AU - Ki, Ju Hee
AU - Yeong Hwang, Jung
AU - Nyang, Dae Hun
AU - Hoon Lee, Dong
AU - Lim, Jongin
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - Anonymity
KW - Deniable Authentication
KW - E-mail
KW - Strong Designated Verifier Signature
KW - authentication
UR - http://www.scopus.com/inward/record.url?scp=80052156907&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-22603-8_2
DO - 10.1007/978-3-642-22603-8_2
M3 - Conference contribution
AN - SCOPUS:80052156907
SN - 9783642226021
T3 - Communications in Computer and Information Science
SP - 16
EP - 29
BT - Digital Enterprise and Information Systems - International Conference, DEIS 2011, Proceedings
T2 - International Conference on Digital Enterprise and Information Systems, DEIS 2011
Y2 - 20 July 2011 through 22 July 2011
ER -