The PIN is an input to the HSM, where the key actually lives. HSMs are designed from the silicon up to resist inspection or modification of internal state. Ther

The PIN is an input to the HSM, where the key actually lives. HSMs are designed from the silicon up to resist inspection or modification of internal state. There are certainly no baked-in debugging/JTAG interfaces, and the hardware is designed to blow away the key if the chip is under physical or logical attack.