| With the rapid development of Internet, According to Internet era data management and data sharing requirements, network hard disk came into being. Network hard disk is an online storage service, It provides to the user access, file storage, backup, sharing, document management functions.whereever the users are, As long as the Internet connection, they can manage, edit the file stored inside the file system. It has the characteristics of convenient and fast.However most of the current network hard disk needs to register and then use the password to login in the system. This implementation mostly have three insufficiency: First, just apply a simple password to access the network hard disk security is very bad;Second, the content stored on the hard disk file is clear text, any user can read after the network hard disk file is loaded.Third,the user access data on the network, the file data is clear, is easy to be intercepted. the three deficiency leads to network hard disk has poor safety performance, and have been several network hard disk password is cracked, network hard disk content revealed malignant events.According to the above situation, this paper introduce an schema based on the USBKey authentication and encryption,it is applied to the network hard disk system, It is a very good solution to the above problems about security, It will provide reliable security to enterprise applicationsIn order to enable easy use by end users and achieve safe and convenient,this paper through the study of PKI system, the design uses a combination of PKI and USBKey to achieve a set of your own PKI certificate management system. And then study the encryption and decryption algorithms and file data structure. Ultimately, implement files and folders encryption and distribution. In the end, it will give the design and implementation to the funtion of upload, download and other common feature it this network hard disk system. |
