Design And Implement Of Document Protection System On Mobile Phone

With the rapid development of mobile communication technology, mobile Internet will become people's important environment of the future digital living. As one of the access devices of mobile internet, the mobile phone's functions are increasingly rich. It can be used in various activities, such as mobile office, mobile payment, mobile entertainment and so on. As the PC, the mobile phone will become an indispensable tool of daily life. However, we have to face the safety issues behind the development of mobile applications. The mobile phone's environment is not the natural safety, which means the software flaw and hardware defects are always inevitable. Various mobile viruses, Trojans and other malicious software become more and more, which proves the insecurity of the mobile environment. To this end, researchers have proposed various protection technologies and methods include mobile phone firewall, mobile phone antivirus, file encryption system and so on. The main purpose of these measures is to prevent happen unauthorized access, tampering and denying using to important resourcesDocument Information is one of important resources that need to protect. People may store a number of office documents, personal privacy information on the phone in daily work and life, such as in mobile office, information sharing and other activities. These activities will inevitably include some unsafe factors, result to a big security risk in cell phone documents. Therefore, it is necessary and important to study the document protection technology of mobile phone to solve such problems.Traditional document protection technology includes encryption, access control technology and so on. These technologies provide some supports of document security and become the mainstream thinking when designing document protection system. However, the mobile device has some features that are different from the traditional PC that mean the document protection solution for PC does not apply to mobile platforms. Many aspects need to consider in migrating these solution to the mobile phone platform, at least the performance of mobile computing, software design and real user feelings. Therefore, the study of document protection technology with good performance and easy to use characters is a good and meaningful topic.This paper focuses on the document protection technology of the major mobile phone operating system. Firstly, the paper analysis the traditional document protection technology in detail. Then, a new document security solution of mobile platform is given. The virtual file system is enhanced with adding the protection module, which work as encryption and decryption, access control, key updates and other functions. The document application program and security modules are independent of each other. The new solution not only provides document security protection, the unauthorized access is prevention, but also keep the user experience. At last, a prototype system was implemented. Experiments show that the proposed solution is feasible.