important · Physical access
AMD widened a known optical plaintext-recovery exposure to more 7-Series and Zynq-7000 FPGAs.
Affects
AMD 7-Series and Zynq-7000 FPGAs used as programmable logic in embedded and hardware systems.
The practical demonstration remains limited to an XC7A200T, while AMD says the same partial-reconfiguration path makes additional families susceptible in principle.
Detail and 2 sources
The technique requires backside silicon access and specialized optical equipment.
Chain to watch
Prepare the FPGA for unrestricted backside access→↓Observe decrypted partial-bitstream transfer during reconfiguration→↓Recover plaintext through optical measurement→↓Practical recovery has not been demonstrated across every newly named family.
Unverified chainReproduce the technique on devices from each added family and measure layout-specific feasibility.