Abstract—While the original public-key encryption with keyword search scheme (PEKS) has been pointed out to be insecure against off-line keyword-guessing attacks, some public-key encryption with designated tester schemes (dPEKS) proposed recently also encounter the same attacks. Rhee et al. proposed a dPEKS which is intended to prevent the off-line keyword-guessing attacks. However, we find that the off-line keyword-guessing attacks are still working in the test phase when some malicious servers exist. Hence, we add a random parameter into the test phase of Rhee et al.’s scheme to get a more secure and improved dPEKS scheme so as to prevent from keyword-guessing attacks and to benefit the advantages of dPEKS as well.
Index Terms—Searchable encryption, designated tester, data security.
B. J. Wang and T. H. Chen are with Department of Computer Science
and Information Engineering, National Chiayi University, No.300 Syuefu
Rd., Chiayi City 60004, Taiwan (R.O.C.) (e-mail:
F. G. Jeng is with Department of Applied Mathematics, National Chiayi University, No.300 Syuefu Rd., Chiayi City 60004, Taiwan (R.O.C.) (e-mail: firstname.lastname@example.org).
Cite: Wang BingJian, Chen TzungHer, and Jeng FuhGwo, "Security Improvement Against Malicious Server’s Attack for a dPEKS Scheme," International Journal of Information and Education Technology vol. 1, no. 4, pp. 350-353, 2011.