Title :
Security of Tzeng´s time-bound key assignment scheme for access control in a hierarchy
Author :
Yi, Xun ; Ye, Yiming
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore
Abstract :
Tzeng (2002) 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.
Keywords :
authorisation; cryptography; RSA; access control; collusion attack; cryptographic key assignment; key assignment; partial-order hierarchy; secret class keys; Access control; Business; Certification; Cryptography; Defense industry; Government; Protection; Spatial databases;
Journal_Title :
Knowledge and Data Engineering, IEEE Transactions on
DOI :
10.1109/TKDE.2003.1209023
