System and method for generating secret information

Abstract

Embodiments of the invention provide an electronic system for generating secret information comprising a physically unclonable function (PUF) circuit configured to provide the PUF in response to a challenge applied to the PUF circuit The difference between two values ​​of a physical variable. The system is configured to apply a set of challenges during the enrollment phase and measure the difference in physical variables provided by the PUF in response to each challenge. The system comprises: - a help data generator (2) configured to generate help data comprising a set of bits, the bits of the help data being generated in association with each applied challenge, the help data generating a generator configured to generate each helper data bit based on a physical variable difference provided by the PUF in response to the application of the associated challenge, a secret information generator (3) configured to generate during the use phase comprising at least one a secret key of bits, each bit of the key is generated by applying a challenge from the set of challenges, the secret information generator (3) is configured to The data bits and each bit of the key are determined from a difference in physical variables provided by the PUF in response to an applied challenge.

Description

technical field [0001] The present invention relates generally to the field of data and device security, and in particular to methods and devices for generating secret information from Physically Unclonable Functions (PUFs). Background technique [0002] PUFs are increasingly used in many electronic devices that contain secret data to enhance security and make such devices resistant to attacks on the device. Different types of attacks can target electronic devices from the outside in an attempt to access such data, such as side-channel attacks, electromigration (such as power consumption, electromagnetic emissions, duration of operation, etc.), imaging, fault injection, and the like. [0003] PUFs are used in many applications such as identification, authentication and key generation. While there are traditional methods for securing electronic devices for storing secret bits in memory, each instance of a physically unclonable function (PUF) device has a unique and unpredict...

AI Technical Summary

Problems solved by technology

[0015] Current error correction techniques used in PUFs add a level of complexity that is incompatible with low-code devices

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