Research of Trustworthy Software System in the Network

This paper first analyzes the credibility of human society issues, gives a credible model, revealing the essence of credibility, that man´s morality, competence and confidentiality of three aspects. Based on these we analyze the credible issue of the network software, and establish the credibility of a general model and a utility model, give the definition of software credibility and credible degree, and propose the key attributes or evidence of the software credibility: the identity evidence, the evidence of the basic norms and the capability. And finally with the general reliability, anti-aggressive and the basic norms to measure the software credibility is proposed. The software faults and vulnerabilities are classified in this paper, and an assessment method and a credibility formula to the credibility of the network software are given.