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
CN106533654AActive Publication Date: 2017-03-22NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2017-03-22

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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.
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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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