How to config encrypt FPGA with virtex4?

[liuzhili]

I programmed my xcf32p and it config my vlx60 successful. but when I make a encrypt .mcs file and download it to 32p, download the .nky to vlk60, push the reconfig button, but vlx60 do not work, it looks like not config probably, the fpga done pin did not go high. what's wrong? is there any special step to config encrypt .mcs and .nky? could you please give me a step by step tutorial? thank you.

 

[Doka]

May be need additional prepare action for FPGA? (i.e. Virtex-II family need battery power (in power-off device state)? because it save secure key inside FPGA)

PS: In otherwise encrypt -options for protect your firmware to lose meaning.