Differential uncloneable variability-based cryptography

Patent metadata

Field	Value
Publication number	US-9020150-B2
Application number	US-201313887361-A
Country	US
Kind code	B2
Filing date	May 5, 2013
Priority date	Mar 25, 2010
Publication date	Apr 28, 2015
Grant date	Apr 28, 2015

Abstract

Differential uncloneable variability-based cryptography techniques are provided. The differential cryptography includes a hardware based public physically uncloneable function (PPUF) to perform the cryptography. The PPUF includes a first physically uncloneable function (PUF) and a second physically uncloneable function. An arbiter determines the output of the circuit using the outputs of the first and second PUFs. Cryptography can be performed by simulating the PPUF with selected input. The output of the simulation, along with timing information about a set of inputs from where the corresponding input is randomly selected for simulation, is used by the communicating party that has the integrated circuit with the PPUF to search for an input that produces the output. The input can be configured to be the secret key or a part of the secret key.

First claim

What is claimed is:

1. A method to exchange private information, the method comprising:
receiving a simulated output determined by a simulation of a public description of a public physically uncloneable function on an input amongst a range of inputs;
receiving a time associated with the simulation that determined the simulated output;
using the received simulated output and the received time to search, with the public physically uncloneable function, the range of inputs to fin…

Assignees

• Empire Technology Dev Llc

Inventors

• Beckmann Nathan Zachary
• Potkonjak Miodrag

Classifications

• G06F21/602 Primary

  Physics · mapped topic

• H04L9/0866

  Electricity · mapped topic

• H04L9/002

  Electricity · mapped topic

• G09C1/00 Primary

  Physics · mapped topic

• G06F9/455

  Physics · mapped topic