Method for enhancing system reliability based on physical unclonable function

Abstract

The invention discloses a method for enhancing system reliability based on a physical unclonable function. The method comprises the following steps thata client requests data transmission with a server; the server randomly selects a plurality of MOS devices in the MOS array and acquires position information of the MOS devices; the server calculates the time constants of the defects in the MOS devices according to the stored intrinsic parameters of the defects in the MOS devices, then calculates the probability physical unclonable function that the defects in the MOS devices are occupied by carriers, and builds a probability model; the server randomly generates detection time according to the probability model and sends the detection time and the position information to a client; and the server judges the probability that the defects in the plurality of MOS devices are occupied under the detection time according to the probability model and generates a theoretical value secret key, wherein the theoretical value secret key comprises a theoretical authentication bit and a theoretical uncertain bit.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a method for enhancing system reliability by using a physical unclonable function. Background technique [0002] PUF (Physical Unclonable Function) refers to a multiple-input multiple-output system based on the intrinsic characteristics of hardware devices. Because MOS (Metal Oxide Semiconductor, Metal Oxide Semiconductor) devices will have random differences in the process of doping, aging, etc., and the devices will also show inconsistent behavior with each other, a series of CRPs ( Challenge Response Pairs, incentive response pairs), so as to encrypt the information system. After the first optical system-based PUF hardware was realized, various PUFs based on MOS devices were gradually proposed and applied. Because PUF is completely dependent on the underlying physical characteristics, the response function of the device cannot be derived mathematically. In addit...

AI Technical Summary

Problems solved by technology

[0004] Although the RTN PUF has achieved high stability and high robustness of the system, the proposed RTN PUF only responds to the presence or absence of defects in the MOS device, which belongs to the CRPs space (Challenge Response Pairs Space, the number of stimulus response pairs) Smaller "weak" PUFs cannot satisfy authentication systems that require a large number of CRPs, and there are fewer applicable scenarios

Moreover, in terms of key management, all currently proposed PUFs adopt the management scheme of entering all CRPs into the database, but for a "strong" PUF with an exponential CRPs space, this method will actually increase the load on the server. Make the server work less efficiently

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