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Parts 2 and 3 are where it gets really interesting. Unfortunately no part 4 as promised in the Aug 2018 post. [0] https://www.kc8apf.net/2018/05/unpacking-xili
by uticus 3y ago
Parts 2 and 3 are where it gets really interesting. Unfortunately no part 4 as promised in the Aug 2018 post.
[0] https://www.kc8apf.net/2018/05/unpacking-xilinx-7-series-bitstreams-part-2/ https://www.kc8apf.net/2018/05/unpacking-xilinx-7-series-bit...
[1] https://www.kc8apf.net/2018/08/unpacking-xilinx-7-series-bitstreams-part-3/ https://www.kc8apf.net/2018/08/unpacking-xilinx-7-series-bit...
- userbinator 3y agoThe big FPGA companies tend to be a bit lawyer-happy when you start publicly analysing their bitstream formats. I wonder if that's what happened.
- imtringued 3y agoMy hunch would be that knowing the bitstream format allows a competitor to reverse engineer your FPGA somehow. Otherwise I can't imagine what purpose it serves. The most likely reason is that there are some IP cores with complicated licensing schemes and the encryption acts as some form of DRM.