Title :
Modified Chang-Hwang-Wu access control scheme
Author :
Hwang, M.-S. ; Yang, W.-P. ; Chang, Chung-Ching
Author_Institution :
Dept. of Comput. & Inf. Sci., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
It is found that some security classes in the Chang-Hwang-Wu access control scheme can be combined to derive the secret key of their immediate ancestor in some cases. Some slight modifications to the proposed scheme to enhance the security levels are also given.
Keywords :
cryptography; interpolation; modified Chang-Hwang-Wu access control scheme; secret key; security classes; security levels;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19931400
