important · Physical
Backside optical probing can recover plaintext partial bitstreams from an encrypted AMD 7-Series FPGA.
Affects
AMD 7-Series FPGAs, programmable devices used in embedded systems; demonstrated on an XC7A200T Artix-7 and believed by AMD to apply to similarly configured 7-Series and Zynq-7000 devices.
With the chip in hand, backside die access and specialized optical equipment, researchers observed data after decryption as it crossed ICAP and recovered plaintext from an XC7A200T.
Detail and 1 source
Broader 7-Series and Zynq-7000 applicability is stated only in principle, and no fix is available.