Fault injection attack detection in integrated circuits

A system, comprising:

• a circuit block coupled to a general power network;
• at least one independent power network comprising one or more power lines, wherein the at least one independent power network does not supply power to the circuit block,
• wherein the one or more power lines comprise a voltage source line, first voltage line, or both the voltage source line and the first voltage line,
• wherein the at least one independent power network comprises a quiet power source isolated from the general power network using a switch capacitor, wherein the quiet power source comprises the switched capacitor as a charge storage device that is selectively rechargeable by selective connection of the charge storage device to a system voltage source line and a system first voltage line;
• and wherein the charge storage device is coupled to the voltage source line, the first voltage line, or both the voltage source line and the first voltage line;
• a detector coupled to the at least one independent power network to detect a change in a power characteristic of the at least one independent power network;
• and
• sensors, each sensor being coupled to a power line of the one or more power lines of the at least one independent power network and located in an active layer of a chip with the circuit block, wherein the sensors are responsive to at least one type of fault injection attack.