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Eiroa S.,University of Seville | Eiroa S.,Microelectronics Institute of Seville IMSE CNM CSIC | Castro J.,University of Seville | Castro J.,Microelectronics Institute of Seville IMSE CNM CSIC | And 7 more authors.
2012 19th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2012

Physical Unclonable functions (PUFs) have appeared as a promising solution to provide security in hardware. SRAM PUFs offer the advantage, over other PUF constructions, of reusing resources (memories) that already exist in many designs. However, their intrinsic noisy nature produces the so called bit flipping effect, which is a problem in circuit identification and secret key generation. The approaches reported to reduce this effect usually resort to the use of pre- and post-processing steps (such as Fuzzy Extractor structures combined with Error Correcting Codes), which increase the complexity of the system. This paper proposes a pre-processing step that reduces bit flipping problems without increasing the hardware complexity. The proposal has been verified experimentally with 90-nm SRAMs included in digital application specific integrated circuits (ASICs). © 2012 IEEE. Source

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