With the increasing emergence of mobile electronic devices over the last two decades, they are now ubiquitous and can be found in our homes, our cars, our workplaces etc., and have the potential to revolutionise how we interact with the world today. This has led to a high demand for cryptographic devices that can provide authentication to protect user privacy and data security; however conventional cryptographic approaches suffer from a number of shortcomings. Also, today’s mobile devices are low-cost, low-power, embedded devices that are restricted both in memory and computing power. Hence, conventional cryptographic approaches are typically unsuitable as they incur significant timing, energy and area overhead. Physical unclonable functions (PUFs) are a novel security primitive which utilise the inherent variations that occur during manufacturing processing in order to generate a unique intrinsic identifier for a device. This gives it an advantage over current state-of-the-art alternatives. No special manufacturing processes are required to integrate a PUF into a design lowering the overall cost of the 1C, and everything can be kept on-chip enabling the PUF to be utilised as a hardware root of trust for all security or identity related operations on the device. This enables a multitude of higher level operations based on secure key storage and chip authentication. However, the design and implementation of PUF digital circuits is challenging, particularly for Field Programmable Gate Array (FPGA) devices. Since the circuits depend upon process variations, even small changes in environmental conditions, such as voltage or temperature, or unbalanced design that introduces skew, will affect their performance. In this thesis, a number of novel lightweight PUF techniques are proposed and experimentally validated. Furthermore, previously reported PUF techniques are evaluated and compared with the proposed designs in terms of efficiency and a range of performance metrics.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:706678 |
| Date | January 2016 |
| Creators | Gu, Chongyan |
| Contributors | O'Neill, Maire ; O'Sullivan, Elizabeth ; Murphy, Julian |
| Publisher | Queen's University Belfast |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Source | https://pure.qub.ac.uk/portal/en/theses/lightweight-physical-unclonable-functions-circuit-design-and-analysis(6b0e0903-ce49-4927-9bb6-e88db530ea67).html |
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