Authentication method and system

The present invention relates to an authentication method comprising an enrolment stage comprising: o receiving fuzzy data from a noisy authentication factor, and fixed authentication data, o generating a secret string independently from said received fuzzy data and said received fixed authentication data, o deriving metadata from the fuzzy data and the secret string and helper data from the secret string and the metadata, o encrypting the helper data using the fixed authentication data as encryption key, o outputting the encrypted helper data as public data, and an authentication stage comprising o receiving the public data output during the enrolment stage, further fuzzy data and said fixed authentication data, o decrypting the received public data using the fixed authentication data as decryption key, o recovering the helper data and the metadata from the decrypted public data, o reproducing the secret string using the further fuzzy data and the recovered metadata, o validating the reproduced secret string using the recovered helper data, o releasing the reproduced secret string if the validating yields a positive outcome.

Patent Publication Number: EP3532972

Year filing: 2022

Year approval: 2022

Year publication: 2022

Status: Assigned

Technology domains: Computer technology

Validated for IOF-key: Yes

Attributed to: Associatie KULeuven