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Practical Experiments to Evaluate Quality Metrics of MRAM-Based Physical Unclonable Functions

Lionel Torres 1 Arash Nejat 1 Bertrand Cambou 2 Frédéric Martial Ouattara 1 Ken Mackay 3 Mohammad Mohammadinodoushan 2 
1 ADAC - ADAptive Computing
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : Process variations in the manufacturing of digital circuits can be leveraged to design Physical Unclonable Functions (PUFs) extensively employed in hardware-based security. Different PUFs based on Magnetic Random-Access-Memory (MRAM) devices have been studied and proposed. However, most of such research has been simulation-based, which do not fully capture the physical reality. We present experimental results on a PUF implemented on dies fabricated with a type of the MRAM technology namely Thermally-Assisted-Switching MRAM (TAS-MRAM). To the best of our knowledge, this is the first experimental validation of a TAS-MRAM-based PUF. We demonstrate how voltage values used for writing in the TAS-MRAM cells can make stochastic behaviors required for PUF design. The analysis of the obtained results provides some preliminary findings on the practical application of TAS-MRAM-based PUFs in authentication protocols. In addition, the results show that for key-generation protocols one of the standard error correction methods should be employed if the proposed PUF is used.
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Submitted on : Sunday, October 4, 2020 - 5:34:12 PM
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Lionel Torres, Arash Nejat, Bertrand Cambou, Frédéric Martial Ouattara, Ken Mackay, et al.. Practical Experiments to Evaluate Quality Metrics of MRAM-Based Physical Unclonable Functions. IEEE Access, IEEE, 2020, 8, pp.176042-176049. ⟨10.1109/ACCESS.2020.3024598⟩. ⟨lirmm-02957087⟩



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