期刊
JOURNAL OF APPLIED PHYSICS
卷 127, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/5.0005335
关键词
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资金
- DOE's National Nuclear Security Administration [DE-NA0003525]
- Laboratory Directed Research and Development Program
- Sandia National Laboratories Truman Fellowship Program
A physically unclonable function (PUF) is an embedded hardware security measure that provides protection against counterfeiting. Here, we present our work on using an array of randomly magnetized micrometer-sized ferromagnetic bars (micromagnets) as a PUF. We employ a 4 mu m thick surface layer of nitrogen-vacancy (NV) centers in diamond to image the magnetic field from each micromagnet in the array, after which we extract the magnetic polarity of each micromagnet using image analysis techniques. After evaluating the randomness of the micromagnet array PUF and the sensitivity of the NV readout, we conclude by discussing the possible future enhancements for improved security and magnetic readout.
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