A Generalized Trust Calculation Algorithm

Abstract

Abstract the current world is a digital world. And certainly we are living simultaneously with digital equipment. The digital computer is no exception. Human life, now a days, largely depends upon computer systems. We use computers for complex mathematical calculations, gaming, day to day account keeping, train tickets reservation, flight ticket reservation, war weapon launching, and space science. The list is keeps on going. The computer based systems are invented or discovered to make human life easier. But the journey is not so easy. If any system starts malfunctioning or behaving abnormally then it starts harming to the human race. As for example: If a war weapon controlling system is mal-programmed then it may possible that weapon may be launched if there is no bellicose situation or may be placed on different trajectory. Another example we may suggest from internet hacking. The confidential data may be hacked and can be used for malicious purpose. Both the example suggests one single point. Even though we use computer based system to make our life easier, it is not advisory to trust on the system without any examination. The trust is not a functionality of the system, but is a very important attribute. It is considered as a soft security. The more trusty a system is, the more reliable it will be. And it will be safer to use the system. The calculation of trust is not depending on one parameter. Various parameters need to take into accounts to calculate the trust. In this article we are proposing an algorithm for achieving the same. This algorithm is based on two concrete mathematical tools: The Markov Chain and The Baye’s Theorem. The Markov chain or model is used to calculate the trust based on some previous trust factors. The Baye’s theorem is used to find the probability of finding the truthfulness of the data.

Keywords: Multi-Agent System, JADE,Markove Chain, Baye’s Theorm, Trust Calculation