Improving a Forward & Backward Secure Key Management Scheme for Wireless Sensor Networks
DongGook Park · Journal of information and communication convergence engineering · 2009
Park proposed a forward & backward Secure key management scheme in wireless sensor networks for Process Control Systems (PCSs) or Supervisory Control and Data Acquisition (SCADA) systems [7]. The scheme, however, is still vulnerable to an attack called sandwich attack: two nodes captured at times and , respectively, surrenders all the group keys used between times and . In this paper, we propose a fix to the scheme, which can limit the vulnerable time duration to an arbitrarily chosen time span while keeping the forward and backward secrecy of the scheme untouched.