A circuit structure of a new arbiter-based physically unclonable function

Abstract

The invention discloses an arbiter-based structure-reconfigurable circuit structure of a physical unclonable function (PUF). The structure is formed by n MUX Groups, n arbiters and 2n-2 MUXes. An internal structure of each MUX Group is formed by j groups of MUXes which are symmetrically arranged and in front-back cross-transmission. Two output signals of the MUX Group are connected with an arbiter, and also used as input to two symmetrically placed MUXes. The other input ends of the two MUXes are connected with a system clock. Output of the MUXes is connected with input of a next-stage MUX Group. Therefore, selection signals of the MUXes can control whether input signals of the next-stage MUX Group are from the output of the previous stage or from the system clock. According to the circuitstructure, series connection and parallel connection of the various-stage MUX Groups can be realized, thus a reconfigurable effect of the PUF structure can be realized, and simultaneous output of single-bit or multi-bit valid-data can be realized.

Description

technical field [0001] The invention relates to the design of a physically unclonable function in the field of integrated circuits, in particular to a circuit structure of an arbiter-based structurally reconfigurable physically unclonable function. Background technique [0002] The unclonable function based on the arbiter is a form of realization of the physical unclonable function (PUF) on the silicon chip. It mainly uses the physical randomness generated by the manufacturing process deviation of the device to extract the characteristic quantity uniquely related to the object. Through this characteristic quantity, the corresponding object can be uniquely identified, and this characteristic quantity cannot be copied, because the process deviation in the production process cannot be copied. Therefore, PUF based on semiconductor technology has the properties of non-replicability, uniqueness, stability, and immunity to invasive attacks. The currently popular symmetric encrypti...

AI Technical Summary

Problems solved by technology

In fact, there are process deviations in the chip manufacturing process, which leads to different lengths of the two delay paths through which the jump signal passes, resulting in different transmission delays. The output of the arbiter reflects this physical randomness

According to the structure of the traditional PUF, the structure cannot be changed dynamically, and only one bit of valid data can be generated in each cycle.

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