| 摘要 |
<p>A multi-memory, physically isolated PC security device, which adopts network isolation system to physically isolate the protected data from the network and nullify the possibility of illegal users attacking confidential data online. The protect card is used to minimise the possibility of decoding the confidential data when an illegal user uses the PC or when the hard disk is lost, preventing him from reading the files or the logical structure in the hard disk under protection. The physical isolation of the main hard disk system from the protected hard disk system is controlled by the network isolation system switch. The system under protection could not log in the LAN and, when switching the system, the network isolation system would monitor all storage media and cut the switch under abnormorl conditions. This invention features hardware processing, short delay, high security by preventing illegal access to or copy of encrypted data files and flexibility for users to configure different arithmetics and key lengths according to their needs. This system would not bottleneck the speed of transimitting data tiles, either.</p> |
