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the e-business or research environments. As web service technology have developed quickly and have been used broadly, cloud computing system could evolve to cloud computing service, which integrates the cloud computing with web service technology. So we could extend the trusted computing mechanism to cloud computing service systems by integrating the TCP into cloud computing system.

In the network computing environment, trust will go on to envision a connected, digital world in which trusted entities would interact with one another in much the same way individuals and businesses interact in traditional commercial relationships. ' The digital space needs that the specific area of similar transactions needs to have faith. Some equally accepted on the some intent that shall be satisfied and their privileges confined”. For true commerce automation to exist, trading partners must know what to expect from each other's systems.” Trusted computing, therefore, must provide the basis for trusted transactions to occur, and trusted computing technologies must allow stakeholders to express policies and have those policies negotiated and enforced in any execution environment.

1. Authentication cloud computing environment with TCP

In cloud computing environment, different entities can appeal to join the CLOUD. Then the first step is to prove their identities to the cloud computing system administration. Because cloud computing should involve a large amount of entities, such as users and resources from different sources, the authentication is important and complicated. Considering these, we use the TCP to aid to process the authentication in cloud computing.

The TCP is based on the TPM. The TCP is based on the TPM. It can resist the attack from software, and even the hardware attack. The TPM contain a private master key which can provide protect for other information store in cloud computing system. Because the hardware certificate can store in TPM, it is hard to attack it. So TPM can provide the trust root for users.

Since the users have full information about their identity, the cloud computing system can use some mechanism to trace the users and get their origin. Because in the TCP the user's identity is proved by user's personal key and this mechanism is integrated in the hardware, such as the BIOS and TPM, so it is very hard to the user to make deceiving for their identity information. Each site in the cloud computing system will record the visitor's information. So by using the TCP mechanism in cloud computing, the trace of participants can be known by the cloud computing trace mechanism.

2. Role Based Access Control Model in cloud computing environment

In the cloud computing system, there are a great number of users who hope to make the access to the cloud computing service. They do have their own goal and behavior. If the cloud computing systems hope to deal with them one by one, there will be a great hard work. In order to reduce the complication of the access control model, we can classify them into several classes or groups and make the access control criteria for these classes. So the users should firstly register themselves into one or some of the classes and get some credential to express their identities. When the本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。