Patent ID: 8446250

Claim:
A method for providing digital security by means of a reconfigurable physical uncloneable function, which comprises a physical system constituted by distributed components arranged to generate a first response when receiving a first challenge at a point on said physical system, the method comprising: providing a reconfiguration unit designed to provide an external action that will physically reconfigure the reconfigurable physical uncloneable function, the physical reconfiguration of the reconfigurable physical uncloneable function providing a new challenge-response behavior that is independent of the challenge-response behavior before said reconfiguration, and physically reconfiguring said reconfigurable physical uncloneable function, which comprises redistributing said components using the reconfiguration unit such that they generate a second response, which differs from said first response, when again applying said first challenge at said point, the physical reconfiguration affecting the physical structure of the reconfigurable physical uncloneable function.