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Configurable physically unclonable function circuit and response generation method thereof

A functional circuit and physical technology, applied in the direction of generating pulses, pulses, and electrical pulses in logic circuits, it can solve the problems of unclonable function circuits and their response generation mechanisms, achieve good uniqueness and reliability, and improve flexibility. , the effect of reducing unit cost

Active Publication Date: 2017-03-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] Purpose of the invention: In order to solve the above technical problems, the present invention proposes a configurable physical unclonable function circuit and its response generation mechanism, which can generate enough stimulus-response pairs with less resource consumption

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  • Configurable physically unclonable function circuit and response generation method thereof
  • Configurable physically unclonable function circuit and response generation method thereof
  • Configurable physically unclonable function circuit and response generation method thereof

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Embodiment Construction

[0025] The invention adopts a two-input XOR gate to replace the inverter in the traditional ring oscillator, and utilizes the random difference between the oscillation frequencies of the ring oscillator configured by the two-input XOR gate to generate excitation-response pairs. The present invention will be further described below in conjunction with the accompanying drawings and embodiments. In an embodiment, the XOR gate is a two-input XOR gate.

[0026] figure 1 It is a schematic diagram of the physical unclonable function circuit structure of the ring oscillator with two-input XOR gate in this embodiment. The two-input XOR gate is used to replace the inverter in the traditional ring oscillator, and various possible oscillations are obtained by adjusting the configuration signal frequency. The oscillation frequency of each ring oscillator is different from each other, and the random response value is generated by extracting the slight difference between the oscillation fr...

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Abstract

The present invention provides a configurable physically unclonable function circuit and a response generation method thereof. A configurable annular oscillator in the circuit is a serial loop formed by sequentially connecting n two input XOR gates and a two input AND gate in series. In the circuit structure, the two input XOR gates replace a phase inverter in a traditional annular oscillator, and an excitation response pair is generated by extracting randomness differences of oscillation frequencies of the configurable annular oscillator. A configuration signal is adjusted, so that the circuit generates the same bit sequence with fewer resources, therefore, the unit cost is greatly lowered.

Description

technical field [0001] The invention relates to the field of physical unclonable functions, in particular to a configurable physical unclonable function circuit and its response generating mechanism. Background technique [0002] Physically unclonable functions are a promising cryptographic technique. It can extract the random differences introduced by each chip due to the process deviation in the integrated circuit manufacturing process, and convert it into a corresponding bit sequence, which can be used as the "digital fingerprint" of the chip and uniquely identify the chip. [0003] The physical unclonable function based on the ring oscillator is a new type of circuit structure proposed in recent years, which realizes the response output by comparing the difference in oscillation frequency between different ring oscillators. In order to increase the randomness of the response sequence, the structure of each ring oscillator must be identical in structure and highly symmet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/06H03K3/03
CPCH03K3/0315H04L9/06
Inventor 刘伟强张磊崔益军王成华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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