Research On Context Security Based On Android

Nowadays, smartphones, as an important part of high- tech products, make a great contribution to the rapid development of the Internet. Smartphone brings great convenience with its intelligence and portability. In other words, the updated smartphone drives the development of the mobile Internet. Now smartphones have been used widely, not only in personal communication, but also in entertainment, social intercourse, office, finance, medical care, etc. More and more information has been dealt with or stored on smartphones, which also act as a medium to receive and send plenty of Internet statistics. Therefore, people take more attention on the security and secrecy problems of smartphones and expect to solve them quickly.In this dissertation, the context and security are organically combined and investigated. The main contributions are as follows:First, the concept of security context is proposed, and a detailed introduction of security context with some examples is given. Based on the context, context security provides security protection for smartphones. For instance, the smartphone user may not want his colleagues to operate some of his applications or to use the browser to look up message when he is at work. In the view of security context, user hopes his security was protected by security applications when he is at work.Second, this paper presents the security protection algorithm based on the security context, including context-aware, context representation, and context match. Context representation consists of context filtration and context formatting. In context match, this dissertation introduces two algorithms to solve the matching conflict. One is based on the context portion and the other is based on the Markov chain.Third, this dissertation achieves the security protection of Android Phone. Its main function is protecting the security and privacy of smartphones according to the principle of security context. It also includes other functions, such as the set of security context, the col ection of statistic, the match of context, and the operation rules.