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http://dx.doi.org/10.6109/jkiice.2020.24.8.1037

Switched SRAM-Based Physical Unclonable Function with Multiple Challenge to Response Pairs  

Baek, Seungbum (School of Electrical Engineering, Chungbuk National University)
Hong, Jong-Phil (School of Electrical Engineering, Chungbuk National University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.24, no.8, 2020 , pp. 1037-1043 More about this Journal
Abstract
This paper presents a new Physical Unclonable Function (PUF) security chip based on a low-cost, small-area, and low-power semiconductor process for IoT devices. The proposed security circuit has multiple challenge-to-response pairs (CRP) by adding the switching circuit to the cross-coupled path between two inverters of the SRAM structure and applying the challenge input. As a result, the proposed structure has multiple CRPs while maintaining the advantages of fast operating speed and small area per bit of the conventional SRAM based PUF security chip. In order to verify the performance, the proposed switched SRAM based PUF security chip with a core area of 0.095㎟ was implemented in a 180nm CMOS process. The measurement results of the implemented PUF show 4096-bit number of CRPs, intra-chip Hamming Distance (HD) of 0, and inter-chip HD of 0.4052.
Keywords
CMOS; IoT; Physical Unclonable Function; Security; SRAM;
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Times Cited By KSCI : 2  (Citation Analysis)
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