Cryptanalysis and security improvements of 'two-factor user authentication in wireless sensor networks'

Sensors (Basel). 2010;10(3):2450-9. doi: 10.3390/s100302450. Epub 2010 Mar 23.

Abstract

User authentication in wireless sensor networks (WSN) is a critical security issue due to their unattended and hostile deployment in the field. Since sensor nodes are equipped with limited computing power, storage, and communication modules; authenticating remote users in such resource-constrained environments is a paramount security concern. Recently, M.L. Das proposed a two-factor user authentication scheme in WSNs and claimed that his scheme is secure against different kinds of attack. However, in this paper, we show that the M.L. Das-scheme has some critical security pitfalls and cannot be recommended for real applications. We point out that in his scheme: users cannot change/update their passwords, it does not provide mutual authentication between gateway node and sensor node, and is vulnerable to gateway node bypassing attack and privileged-insider attack. To overcome the inherent security weaknesses of the M.L. Das-scheme, we propose improvements and security patches that attempt to fix the susceptibilities of his scheme. The proposed security improvements can be incorporated in the M.L. Das-scheme for achieving a more secure and robust two-factor user authentication in WSNs.

Keywords: authentication; cryptanalysis; security; smart card; wireless sensor network.

MeSH terms

  • Biometric Identification
  • Computer Security*
  • Humans
  • Remote Sensing Technology / instrumentation*
  • Remote Sensing Technology / methods*