| 摘要 |
<p>The present invention concerns a method of providing robust and secure fingerprints comprising, at an enrolment stage, the steps of providing a content x for which a fingerprint is to be provided, assigning an ID number to said content x, providing a secret key k, generating a fingerprint b x based on content x and secret key k, storing the generated fingerprint b x together with the assigned ID in a database, as well as, at an identification stage, the steps of extracting, for a given query content y which might result either from the enrolled content x or an unrelated content x', an estimate fingerprint by based on content y, and secret key k, producing an estimated I number based on said estimate fingerprint b y for identifying the content x using said ID number stored in the database, or else rejecting the query. The method distinguishes from prior art in that, at the stage of generating the fingerprint b x , it comprises the step of modulating the content x in the space of secret carriers of a transform domain defined by the key k such as to produce a modulated content vector v, said vector v replacing content x and being adapted to be used during the identification stage.</p> |
