Protecting intellectual property in FPGA Xilinx design

The problem of intellectual property protection in design process of FPGA Xilinx is considered. Soft- and hardware destined to control license agreements are discussed, because such an agreement for Xilinx FPGA CAD forbids the use of this tool for a reverse engineering. It is shown, that there are classes of FPGA devices whose configuration files are not decompilable. In particular, such a class consists of devices with partial dynamic reconfiguration by means of an internal reconfiguration controller.