Security evaluation model for threshold cryptography applications in MANET

A dynamic security evaluation model is proposed to evaluate the security of distributed trust third party (TTP) applications based on threshold cryptography in mobile ad hoc networks (MANET). Using stochastic process approach, we study the attack process and build an attack model firstly. A dynamic evaluation model is proposed in the following which can give the proper value of threshold and updating period of sharing secret. Furthermore, analysis of the security influence of threshold value on different distributed CA schemes is provided here, which verifies the theoretical conclusion in previous papers. These results are useful not only to the measurement and evaluation of network security performance, but also to MANET security construction while applying distributed TTP.