Security of the redefined Liaw's broadcasting cryptosystem

Authors:
Wen-Tao Zhu;Chuan-Kun Wu
Affiliations:
State Key Laboratory of Information Security, Graduate University of Chinese Academy of Sciences, P. O. Box 4588, Beijing 100049, China;State Key Laboratory of Information Security, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China
Venue:
Computers & Mathematics with Applications
Year:
2008

Citing 1
Cited 3

Secure group communications using key graphs

IEEE/ACM Transactions on Networking (TON)

Quadratic compact knapsack public-key cryptosystem

Computers & Mathematics with Applications
A secure broadcasting cryptosystem and its application to grid computing

Future Generation Computer Systems
Towards secure and communication-efficient broadcast encryption systems

Journal of Network and Computer Applications

Quantified Score

Hi-index	0.09

Visualization

Abstract

Liaw proposed a broadcasting cryptosystem [H.T. Liaw, Broadcasting cryptosystem in computer networks, Computers & Mathematics with Applications 37 (Mar. 1999) 85-87] which claims to involve fewer broadcasting messages, and has attracted quite some research efforts on iterative analysis and improvement [H.M. Sun, Security of broadcasting cryptosystem in computer networks, Electronics Letters 35 (Nov. 1999) 2108-2109; Y.M. Tseng, J.K. Jan, Cryptanalysis of Liaw's broadcasting cryptosystem, Computers & Mathematics with Applications 41 (Jun. 2001) 1575-1578; J.M. Masque, A. Peinado, Cryptanalysis of improved Liaw's broadcasting cryptosystem, Journal of Information Science and Engineering 22 (Mar. 2006) 391-399]. We show that the redefined Liaw's broadcasting cryptosystem recently presented in [J.M. Masque, A. Peinado, Cryptanalysis of improved Liaw's broadcasting cryptosystem, Journal of Information Science and Engineering 22 (Mar. 2006) 391-399] is still insecure in that an unauthorized user is able to obtain the shared secret, which is only intended for certain privileged users.