Cloud computing requires a lot of participation of the users, so it inevitablely is faced with emergent problem of privacy. The participation of users means to collect some data of the users, thereby it leads to the user's worry about data security. Many users are concerned about their privacy data will be collected by cloud technology . Because of this, before joining the cloud computing plan, a lot of manufacturers are committed to avoid collecting user privacy data. Even if these data are collected, they will not be showed or used. But many people still doubt that the firm commitment, and their doubt also have some reasons. Many well-known manufacturers have been accused of having may disclose user privacy, and some relevent events occurs some times.
There are some basic methods to protect the privacy of users.Firstly,the users should know about the storage position of their data.For example, Google allows customers to specify the position of their Google Apps data .Secondly,the encryption of data should be taken. Data encryption can reduce the risks of both inadvertent and malicious disclosure of the users' data ,not only the data that are stored in the server of the cloud computing service provider,but also the data that are transmitted to the end users.
Based on all above,the privacy problem is still a big one.It is expected that some new policies be adopted and to reduce the problems of the disclosure of user's privacy.
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It is necessary for people to protect their privacy when they use computer and some measures should be taken to protect.
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