Random signal generation device and physical unclonable function generation system

Abstract

The invention provides a random signal generation device and a physical unclonable function generation system. The device comprises: a dynamic clock generator which is used for providing clock signals for an input register, a signal generation unit and an output register; the input register which is used for sending a clock signal to the signal generation unit; the signal generation unit which is used for generating a first output value and a second output value according to the frequency of the clock signal, and sending the first output value and the second output value to the output register; and a comparator which is used for obtaining the first output value and the second output value from the output register and generating a random signal based on the first output value, the second output value and a correct value. The method has the advantages of simplicity and high stability; the signal generation unit works at a relatively low working frequency, so that the problem of failure of the counter can be effectively avoided; the complexity and randomness of the PUF structure can be effectively improved, and the modeling attack coping capability of the PUF is improved.

Description

technical field [0001] The present invention relates to the technical field of physical unclonable functions, in particular to a random signal generation device and a physical unclonable function generation system. Background technique [0002] In a broad sense, PUF (Physical Unclonable Function) refers to a physical entity that can produce a unique output response under specific input conditions (also called challenges). Because of the uncontrollability of the process deviation in the production process, the impulse Response pairs are unique in nature and cannot be copied. [0003] Because there will be some unavoidable physical errors in the semiconductor manufacturing process, such as transistor size, doping concentration, channel length, etc., and these will directly affect the electrical characteristics such as delay and threshold voltage in the working state of the semiconductor device, and these processes Errors are random and unpredictable, which directly makes each...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional time-delayed PUF such as RO PUF (Ring Oscillator Physical Unclonable Function), the physical unclonable function of the ring oscillator, although the structure is simple, but the first is because every two ring oscillators can only produce 1-bit output, while the ring oscillator As an additional device, if you want to extract a response of sufficient length, it will inevitably cause a waste of on-chip resources. Second, with the advancement of technology, RO PUF is more and more affected by the environment, and the oscillation frequency generated by the ring oscillator with the same number of stages will be faster and faster

Third, the data path model of the ring oscillator is relatively simple, which cannot extract enough process deviation information and is more vulnerable to modeling attacks

[0005] The PUF based on bistable parameters represented by SRAM (Static Random Access Memory) PUF is widely used because it directly uses existing resources as an entropy source to provide randomness, but because there are some unstable states in SRAM PUF , so depending on post-processing technology, additional helper data and fuzzy extractors are required, as well as device aging, negative bias temperature instability affects the reliability of SRAM PUF

[0006] In summary, the existing PUF has poor stability, low complexity and randomness, and the ability of PUF to deal with modeling attacks is also poor, and there is a problem of counter failure

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