A hierarchical key assignment scheme is a method to assign some private information and encryption keys to a set of classes in a partially ordered hierarchy, in such a way that the private information of a higher class can be used to derive the keys of all classes lower down in the hierarchy.
So, this paper proposes a new scheme that uses the concepts of Chinese Remainder Theorem [F.H. Kuo, V.R.L. Shen, T.S. Chen, F. Lai, A Cryptographic Key Assignment Scheme for Dynamic Access Control in a User Hierarchy, "IEE Proceeding on Computers & Digital Techniques", Vol. 146, No. 5, Sept. 1999, pp. 235 240., T.S. Chen, Y.F.
Computers & Security 21(2), 164 171] separately proposed a cryptographic key assignment scheme based on polynomial interpolations to solve the access control problem in a partially ordered user hierarchy.
In this paper, we analyse the security of a cryptographic key assignment scheme, recently proposed by Huang and Chang, that is designed to provide time-constrained hierarchical access control.
He has been unable to spur progress on the key assignment Mr. Paterson handed him: a long-term restructuring of how the state spends its money.
Cryptanalyses and improvements of two cryptographic key assignment schemes for dynamic access control in a user hierarchy.
A bit of casual flirting with your boss might attract just enough extra attention to land you that key assignment you were hoping for, or help you secure a more desirable shift.
In a similar way, key assignments have only a modest effect on the error entry rate.
ψ is a suitable logical formulation of the statement A has K C. O consists of a set of key assignments believed by B, as well as a conservative revision operator ∗.
