Recent reports indicate the issue of a patent assigned to IBM, regarding a graphene resistor based tamper resistant identifier with contactless reading. The invention seems to relate to an identification system that is more immune to copying than traditional barcodes.
The method for creating this invention includes arranging an array of graphene resistors in parallel or series. The method also includes forming a unique identification code based on respective temperatures emanating from respective voltages output from the graphene resistors when the array of graphene resistors is in a powered state. Another aspect described in the patent application is an authentication apparatus that includes a plurality of graphene resistors with a bandgap voltage generation circuit or a bandgap current generation circuit connected to the plurality of graphene resistors for powering up the plurality of graphene resistors in the powered state.
In July 2014, IBM announced its intention to invest $3 billion in the course of 5 years in a quest to find the next-generation chip technology to replace silicon.