B. Wagle
EJOR
In [1], Tzeng proposed a time-bound cryptographic key assignment scheme for access control in a partial-order hierarchy. In this paper, we show that Tzeng's scheme is insecure against the collusion attack whereby three users conspire to access some secret class keys that they should not know according to Tzeng's scheme.
B. Wagle
EJOR
Preeti Malakar, Thomas George, et al.
SC 2012
Ziyang Liu, Sivaramakrishnan Natarajan, et al.
VLDB
Corneliu Constantinescu
SPIE Optical Engineering + Applications 2009