TY - GEN
T1 - An efficient signcryption scheme with key privacy
AU - Li, Chung Ki
AU - Yang, Guomin
AU - Wong, Duncan S.
AU - Deng, Xiaotie
AU - Chow, Sherman S. M.
PY - 2007
Y1 - 2007
N2 - In Information Processing Letters 2006, Tan pointed out that the anonymous signcryption scheme proposed by Yang, Wong and Deng (YWD) in ISC 2005 provides neither confidentality nor anonymity. However, no discussion has been made on whether YWD scheme can be made secure. In this paper, we propose a modification of YWD scheme which resolves the security issues of the original scheme without sacrificing its high efficiency and simple design. Indeed, we show that our scheme achieves confidentiality, existential unforgeability and anonymity with more precise reduction bounds. In addition, our scheme further improves the efficiency when compared with YWD, with reduced number of operations for both signcryption and de-signcryption. © Springer-Verlag Berlin Heidelberg 2007.
AB - In Information Processing Letters 2006, Tan pointed out that the anonymous signcryption scheme proposed by Yang, Wong and Deng (YWD) in ISC 2005 provides neither confidentality nor anonymity. However, no discussion has been made on whether YWD scheme can be made secure. In this paper, we propose a modification of YWD scheme which resolves the security issues of the original scheme without sacrificing its high efficiency and simple design. Indeed, we show that our scheme achieves confidentiality, existential unforgeability and anonymity with more precise reduction bounds. In addition, our scheme further improves the efficiency when compared with YWD, with reduced number of operations for both signcryption and de-signcryption. © Springer-Verlag Berlin Heidelberg 2007.
KW - Ciphertext anonymity
KW - Gap Diffie-Hellman
KW - Key privacy
KW - Signcryption
UR - http://www.scopus.com/inward/record.url?scp=37849005027&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-37849005027&origin=recordpage
U2 - 10.1007/978-3-540-73408-6_6
DO - 10.1007/978-3-540-73408-6_6
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9783540734079
T3 - Lecture Notes in Computer Science
SP - 78
EP - 93
BT - Public Key Infrastructure
A2 - Lopez, Javier
A2 - Samarati, Pierangela
A2 - Ferrer, Josep L.
PB - Springer
CY - Berlin, Heidelberg
T2 - 4th European Public Key Infrastructure Workshop: Theory and Practice (EuroPKI 2007)
Y2 - 28 June 2007 through 30 June 2007
ER -