High safety APUF circuit structure

Abstract

The invention discloses a high safety APUF circuit structure comprising n+1 / 2 units and two arbiters. Each unit comprises four phase inverters and four 4-to-1 multipath selectors. The circuit structure comprises four signal paths. Each signal path is formed by one phase inverter and one multipath selector of each unit through spaced arrangement. Every two excitations of the input excitations formthe address input end signal of the multipath selector, and the four data input ends are connected with the four phase inverters to form cross connection. The output end of the multipath selector is connected with the phase inverter of the next unit and the data output ends of the first and fourth multipath selectors of the last unit are connected with the same arbiter, and the data output ends ofthe remaining two multipath selectors are connected with the other arbiter and Exclusive OR operation is performed according to the output of the two arbiters so as to obtain the response. Each excitation is corresponding to one structure and there is no fixed model so as to have high model attack resistance capacity and high uniqueness.

Description

technical field [0001] The invention relates to a high-safety APUF circuit structure, belonging to the technical field of APUF circuits. Background technique [0002] In recent years, with the rapid development of the Internet of Things and radio frequency identification technology, embedded systems have been widely used in various occasions in people's lives, from medical equipment, automobile manufacturing to avionics and industrial Internet, the security of these embedded devices, Privacy has become a matter of great concern. However, these systems do not have the ability to resist hardware attacks, and are easily extracted from identity authentication information, thereby being copied and replaced. The traditional method is to use some encryption protocols to protect the security of the embedded system. This security is mainly based on non-volatile registers (Non-volatile Memory, NVM) such as EEPROM and Flash for security authentication and key storage. However, the st...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a high-security APUF circuit structure, and solve the problem that the existing structure has poor anti-model attack ability, increased structural resource consumption, and cannot satisfy some resource-limited conditions. The problem of reliable implementation of PUF

Images