Improvements on Trust Transitivity Model for Open Network

Traditional security mechanisms have not met with the needs of open network. Trust mechanism will be an important trend in the field of security. Present studies still have some kinds of deficiency. In this paper, Further works are done in trust transitivity model. As an important factor, recommendation ability ("honesty") is considered to take part in computing recommendation trust value. Trust storage structures about "honesty" and "accuracy" are provided, which are based on n history windows and are renewed with time goes on. New trust transitivity tree is studied, which has made differentiation from "honesty" and "accuracy". Finally, a recursion-arithmetic about trust transitivity is given. Experimentation results show novel trust model is rational, correct and valid.