Security Improvement Against Malicious Server’s Attackfor a dPEKS Scheme
Bingjian Wang, TzungHer Chen, Fuh-Gwo Jeng · International Journal of Information and Education Technology · 2011
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.