Physical unclonable function (PUF) circuit based on threshold voltage reference

Abstract

The invention discloses a physical unclonable function (PUF) circuit based on threshold voltage reference. The PUF circuit comprises a threshold voltage reference array, a row decoder, a column decoder and a digital comparator; an input end of the PUF circuit is connected with an input end of the row decoder and an input end of the column decoder; an output end of the row decoder is connected withthe column decoder by means of the threshold voltage reference array; an output end of the column decoder is connected with an input end of the digital comparator; the threshold voltage reference array comprises at least two same single voltage reference circuits, and each single voltage reference circuit comprises a zero-threshold N-channel metal oxide semiconductor (NMOS) transistor, a first high-threshold P-channel metal oxide semiconductor (PMOS) transistor and a second high-threshold PMOS transistor; the digital comparator comprises a first PMOS transistor, a first NMOS transistor, a second NMOS transistor, a sampling capacitor, an AND gate and a bidirectional counter, wherein an output end of the bidirectional counter is taken as an output end of the PUF circuit. The PUF circuit based on threshold voltage reference has the advantages of very high competitiveness in the aspects of uniqueness and reliability, and low power consumption.

Description

technical field [0001] The invention relates to a circuit for anti-counterfeiting, authentication and key management, in particular to a PUF circuit based on a threshold voltage reference, which belongs to the technical field of integrated circuits. Background technique [0002] With the vigorous development of the Internet of Things (IoT) market, people are eager to ensure device security and information privacy through limited chip resources. Physically Unclonable Properties Functions (PUFs) hold great promise as a lightweight secure primitive key management and device identification / authentication. It extracts reliable and unique stimulus-response pairs (CRPs) from uncontrollable and unpredictable process variations during chip fabrication. Compared with traditional key management methods that store private keys in non-volatile memory, the PUF encryption component embeds secret information in its own physical structure. Therefore, it is resistant to a wide range of inva...

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Problems solved by technology

However, its disadvantage is that in current mirrored arrays, the large static power supply limits its application in power-constrained designs

[0004] Proportional to absolute temperature (PTAT) PUFs have also been exploited into an ultra-compact layout (J.Li and M.Seok, ―Ultra-compact and robust physically unclon-able function based onvoltage-compensated proportional-to-absolute-temperature voltage generators," IEEE Journal of Solid-State Circuits, vol.51, no.9, pp.2192–2202, Sept.2016), but it is sensitive to temperature changes

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