中文摘要：

私人云和公共的云互相正在变成户外综合的云计算环境，它能聚集并且利用广域网和局域网网络计算，存储，信息和其它硬件和软件资源足够地，而且带给一系列安全，可靠性和可靠问题。解决这些问题，可靠的虚拟私人云模型说出 SATVPC 的新奇 secure-agent-based 为计算环境的综合、开的云被建议。通过安全代理人的技术的介绍， SATVPC 为多承租人系统提供一个独立、安全、可靠的计算虚拟私人平台。以便满足 SATVPC 的可靠的需要并且要求在每个任务实行代理人和对他们的安全政策合适的任务执行者节点之间的信任关系，新动态合成可靠评估机制被介绍，包括信用索引计算算法和可靠区别策略。试验性的系统证明 SATVPC 和可靠评估机制能与可行性保证开的计算环境的安全。试验性的结果和性能分析也证明信用索引计算算法能评估任务执行代理人和任务执行者节点份量上的可靠，正确地并且操作上。

英文摘要：

Private clouds and public clouds are turning mutually into the open integrated cloud computing environment, which can aggregate and utilize WAN and LAN networks computing, storage, information and other hardware and software resources sufficiently, but also bring a series of security, reliability and credibility problems. To solve these problems, a novel secure-agent-based trustworthy virtual private cloud model named SATVPC was proposed for the integrated and open cloud computing environment. Through the introduction of secure-agent technology, SATVPC provides an independent, safe and trustworthy computing virtual private platform for multi-tenant systems. In order to meet the needs of the credibility of SATVPC and mandate the trust relationship between each task execution agent and task executor node suitable for their security policies, a new dynamic composite credibility evaluation mechanism was presented, including the credit index computing algorithm and the credibility differentiation strategy. The experimental system shows that SATVPC and the credibility evaluation mechanism can ensure the security of open computing environments with feasibility. Experimental results and performance analysis also show that the credit indexes computing algorithm can evaluate the credibilities of task execution agents and task executor nodes quantitatively, correctly and operationally.