A configurable physically non-clonable function circuit based on delay chain

Abstract

The invention provides a configurable physical non-clone function circuit based on delay chain, which comprises a signal control module, an excitation generation module and at least one delay multi-excitation unit. The delay multi-excitation unit comprises a delay chain; The clock source in the circuit is generated by multiplying the clock of FPGA chip on board and controlled by signal control module. The delay chain is composed of inverting blocks which are configured by the carry-forward chain in series. The random difference of the response of different inverting blocks to the signal is extracted to generate the excitation response pair. The circuit uses fewer resources than other delay-type physical non-clonable function circuits under the condition of generating the same bit sequenceby adjusting the configuration signal of the excitation generation module, thus greatly reducing the unit cost.

Description

technical field [0001] The invention relates to the field of physical unclonable function circuits, in particular to a configurable physical unclonable function circuit based on delay chains. Background technique [0002] Traditional encryption algorithms are generally established based on the concept of a key, and users can pass authentication or decrypt messages only when they have the key. In practical applications, keys are often stored in non-volatile memory or battery-backed random access memory. Such a storage method is vulnerable to physical attacks such as side-channel attacks, intrusions, and semi-intrusion attacks, resulting in key disclosure. In reality, each physical object will introduce some random differences (variations) inside the physical object due to the limitations of the manufacturing process during the manufacturing process, and the introduction of these random differences is uncontrollable in the manufacturing process and cannot Avoid and cannot co...

AI Technical Summary

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 based on delay chains, which can generate enough stimulus-response pairs with less resource consumption

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