Reconfigurable multi-port physical unclonable functions (PUF) circuit unit

Abstract

The invention discloses a reconfigurable multi-port physical unclonable functions (PUF) circuit unit. The reconfigurable multi-port PUF circuit unit comprises a first control circuit module, an input module, an output module and a random process deviation generation module, wherein the first control circuit module is connected with the input module, the output module and the random process deviation generation module respectively; the input module is connected with the random process deviation generation module; and the random process deviation generation module is connected with the output module. The reconfigurable multi-port PUF circuit unit has the advantages that the number of output secret keys and ports can be reconfigured; the number of output secret keys and ports can be exchanged flexibly; a plurality of secret keys can be generated within one clock period; the cost is low; and the running speed is high.

Description

technical field [0001] The invention relates to a PUF circuit, in particular to a reconfigurable multi-port PUF circuit unit. Background technique [0002] The Physical Unclonable Functions (PUF) proposed by Pappu in "Physical One-Way Functions" in March 2001 is unique and unclonable, and can be widely used as identity authentication and anti-counterfeiting means. The use of PUF technology on integrated chips was first proposed by researchers such as Gassend of the Massachusetts Institute of Technology. PUF technology is a "biological feature" identification technology in the field of chips, which can also be called "chip DNA" technology. It uses PUF circuits to extract process deviations (including oxide layer thickness, W / L And random ion doping and other factors), generate an infinite number of unique keys, these keys are unpredictable and arranged, and exist forever, even the chip manufacturer cannot imitate. The PUF circuit dynamically extracts an unlimited number of ...

AI Technical Summary

Problems solved by technology

However, the existing PUF circuit generally outputs the key through one port, and can only output one key in one clock cycle, and the operation speed is relatively slow. In addition, due to the unavoidable process deviation in the chip manufacturing process extracted by the PUF circuit It is unique, so that the output key of the PUF circuit is constant and cannot be reconstructed. When the product (such as a chip) needs to change the password, the entire PUF circuit can only be replaced, and the cost is very high

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