Abstract: A file access controlling method applied to a network for controlling access of a file transferred via a predetermined transmission scheme. The file access controlling method includes obtaining characteristic data corresponding to the file, and comparing a look-up table with the characteristic data, wherein if the look-up table includes a record corresponding to the characteristic data, an access limitation is imposed on the file according to the record to control access of the files.

Abstract: A file management system is used in a peer-to-peer file-share mechanism. The file management system is used for managing at least one file transmitted between at least one data terminal and at least one abstracting terminal via networking. The data terminal stores the file and a searching data corresponding to the file. The searching data comprises a characteristic data of the file and a location of the file. After the characteristic data is chosen at the abstracting terminal, the abstracting terminal traces the location via networking, couples to the data terminal, and further abstracts the file corresponding to the characteristic data. The data terminal uses an encryption module to encrypt the file to an encryption file. A software package is used for conveniently transmitting the file to the abstracting terminal. Thus, the software package can decrypt the encryption file to the file for a user subsequently to use at the abstracting terminal.