Patent ID: 11928248
Assignee: MARVELL ASIA PTE LTD
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A method of preventing a reverse engineering of a sequence of physical unclonable function bit values outputted from an entropy source based on intrinsic properties of a plurality of bitcells in a semiconductor device configured to implement a security protocol that uses a unique device secret generated from the sequence of physical unclonable function bit values, the method comprising:
configuring the entropy source to receive a damage-inducing voltage that is higher than an operating voltage of the entropy source; and
selectively applying the damage-inducing voltage to damage one of at least a portion of the plurality of bitcells or at least a portion of a bitcell read functionality to alter the intrinsic properties of at least a subset of the plurality of bitcells.