A method for on-board generation of cryptographic keys using physical replication difficulty functions

摘要

The present invention relates toA method for generating a cryptographic key from at least one prime numberAt least one hardware processor andThe physical replication difficulty function (208) andA memory (204) storing at least one challenge (CI) and at least one associated increment numberA cryptographic device 101 comprising 205 andThe associated increment number isThe number of incremental steps that will be performed in a predefined cipher prime generation algorithm to generate the at least one prime number from the seed acquired from the challenge using said physical replication difficulty function;Implemented in the runtime by the encryption deviceThe following steps: - obtaining a challenge and at least one associated increment number from said memory (RS1);- generating a seed by applying the physical replication difficulty function to the acquired challenge (RS2);By implementing the cryptographic prime generation algorithmAndIn the cryptographic prime generation algorithmBy performing the increment increment step with at least one increment number as described aboveGenerating the at least one prime number from said generated seed (RS3);- generating a cipher key from the generated prime number (RS4);Related to the method.