Netinfo Security ›› 2018, Vol. 18 ›› Issue (1): 73-79.doi: 10.3969/j.issn.1671-1122.2018.01.011

• Orginal Article • Previous Articles     Next Articles

Cryptanalysis and Security Enhancement of an Efficient Secure Authentication Scheme with User Anonymity for Roaming User in Ubiquitous Networks

Juan QU1(), Yanping LI2, Li LI1   

  1. 1. School of Mathematics and Statistics, Chongqing Three Gorges University, Chongqing 404000, China
    2.College of Mathematics and Information Science, Shaanxi Normal University, Xi’an Shaanxi 710062, China;
  • Received:2017-09-10 Online:2018-01-20 Published:2020-05-11

Abstract:

In this paper, we review an efficient secure authentication scheme with user anonymity for roaming user in ubiquitous networks by Shin et al.. We show that this scheme is vulnerable to forgery attack, insider attack, session key disclosure attack. Moreover, this paper points out that Shin scheme cannot preserve forward secrecy and the password change phase is not correct. Then, we give an enhanced authentication scheme with user anonymity. The authentication scheme improves the original one in two aspects : firstly, the scheme can overcome the weaknesses in Shin' s scheme. Secondly, the scheme has lower computational costs and is more suitable for applications in ubiquitous networks.

Key words: ubiquitous networks, user anonymity, authentication, session key

CLC Number: