- This paper presents a description and performance evaluation of a threshold secret sharing (TSS) authentication scheme for selfsecuring mobile ad hoc networks (MANETs) suffering from high packet-loss and node mobility. In order to evaluate the performance of the TSS scheme in a noisy MANET, a number of simulations were carried-out. We concluded that presence of noise inflicts significant reduction in the authentication success ratio (SR) and consequently degrades the performance of the network, while node mobility inflicts no or insignificant effects. The outcomes of these simulations are so important to facilitate efficient network management.