High-stability APUF circuit based on feedback time delay differential adjustment

Abstract

The invention discloses a high-stability APUF circuit based on feedback time delay differential adjustment. The circuit comprises a PUF delay chain module, a positive hopping signal loading module, afeedback control module, a timer module and an arbiter. The positive hopping signal output by the PUF delay chain module is fed back to be applied to the PUF delay chain module again, the difference of the time sequence from the positive hopping signals to the arbiter in upper and lower paths is enlarged so as to overcome the semi-stable state of the arbiter, the arbiter stably outputs 0 or 1, andtherefore the APUF stability is improved. The high-stability APUF circuit has the advantages of being high in stability, easy to obtain, low in resource consumption and the like.

Description

technical field [0001] The invention relates to a highly stable APUF circuit based on feedback delay difference adjustment, and belongs to the technical field of information security. Background technique [0002] In recent years, with the rapid development of the Internet of Things and radio frequency identification technology, the collaborative relationship between things and things, people and things, and people has been established, thus forming a more comprehensive network based on sensor networks, the Internet and mobile communication networks. Large and complex network systems. Most electronic devices interact with a network or are controlled by a computer. The Internet of Things generates a large amount of information and data, involving perception, storage, computing, transmission and other links, and its security is directly related to the development of the Internet of Things industry. The security of traditional electronic devices is mainly based on non-volatil...

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Problems solved by technology

[0005] In fact, the arbiter has requirements for setup time and hold time. The setup time is the shortest time for the positive jump signal above to reach the arbiter and remain stable before the positive transition signal at the bottom reaches the arbiter. The hold time is at the bottom After the positive transition signal reaches the arbiter, the upper positive transition signal continues to remain stable for the shortest time. Only when the setup time and hold time are met can the arbiter output stably, otherwise the arbiter will appear metastable and be in a metastable state. In the state, the arbiter is sensitive to circuit thermal noise, environmental noise and other interference, resulting in unstable output, thereby reducing the stability of the APUF

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