Physical non-cloneable functional circuit structure based on three delay chains

Abstract

The invention relates to a physical non-cloneable functional circuit structure based on three delay chains. According to the physical non-cloneable functional circuit structure based on the three delay chains, the three delay chains are mutually independent, and no intersecting node exists. The physical non-cloneable functional circuit structure based on the three delay chains comprises a rising edge generator, a challenge generator, a first delay chain 1, a second delay chain 2, a third delay chain 3 and an arbiter, wherein the rising edge generator is used for sending out a hopping signal from '0' to '1', the hopping signal is divided into three branches and then enters the arbiter, and the arbiter judges the sequence of the three branches of the hopping signal and outputs a response value; the challenge generator is used for generating a random challenge value before each response is extracted and extracting multiple response positions continuously, and thus a response sequence with a certain length is formed. The physical non-cloneable functional circuit structure based on the three delay chains has the advantages that due to the adoption of the three mutually independent delay chains, the flexibility of a system is improved, and constant delay deviation of delay chains in a TCPUF can be measured and corrected more easily; for an attacker, the difficulty of analyzing and deducing the delay differences between all delay chains is increased, and the security performance is improved.

Description

technical field [0001] The invention relates to a semiconductor chip applied in the field of information security, in particular to a physical unclonable function circuit structure based on three delay chains. Background technique [0002] With the development and popularization of information technology, all aspects of people's life are developing in the direction of networking and intelligence, and various activities in social life are increasingly realized by electronic systems. ID cards, passports are digitized, Electronic financial transactions. At the same time, smart cards, USBKeys and other circuits implementing cryptographic algorithms are becoming more and more extensive, and these cryptographic devices are increasingly carrying personal and commercial confidential information. [0003] On the other hand, the development of chip cracking technology poses a great threat to chips used in the field of information security. Physical attack belongs to the traditional ...

AI Technical Summary

Problems solved by technology

[0011] The invention solves the problem that the physical unclonable function based on the cross-delay chain structure is difficult to control the inherent delay deviation

Images