Apostol Natsev, Alexander Haubold, et al.
MMSP 2007
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.
Apostol Natsev, Alexander Haubold, et al.
MMSP 2007
Frank R. Libsch, S.C. Lien
IBM J. Res. Dev
Qing Li, Zhigang Deng, et al.
IEEE T-MI
Israel Cidon, Leonidas Georgiadis, et al.
IEEE/ACM Transactions on Networking