A REMOVABLE SECURITY DEVICE AND A METHOD TO PREVENT UNAUTHORIZED EXPLOITATION AND CONTROL ACCESS TO FILES

摘要

A removable security device configured to prevent unauthorized exploitation of files, connectable with a host device, the removable security device comprising a central processor, an operating system, a graphic processor, memories and a communication link configured to exchange data with the host device. The removable security device further comprises an identification module for verifying conformity of at least one user credential received from the host device via the communication link. The operating system enables through a remote desktop agent remote access to at least one file and executes a file processing application with the at least one file. The operating system, the remote desktop agent and the file processing application are stored in a non-volatile memory of the removable security device. The graphic processor generates displayable frames corresponding to the execution of the application with the file. A watermarking module coupled to the graphic processor inserts additional data into the displayable frames, said additional data forming a watermark generated on all or part of the displayable frame. The additional data allows retrieving at least the identifier of the removable security device. The communication link transmits the watermarked displayable frames to the host device.