Customer can use the VSIA to get IP functionnality Insurance. But they still no guarantee during the system implementation... An other subject is about the IP protection for IP provider point of view. Today only FPGA Vendor can proctect their own IP from illegal copy. So many IP provider can be "stole" by a third party IP user without any protection... -baco
Is it Time for a look at IP Insurance?
Customer Insurance IP or IP Vendor protection 
