WATERMARK EMBEDDING AND DETECTION

摘要

Disclosed are methods and systems for embedding and for detecting digital watermarks in information signals. The method of embedding a watermark comprises the steps of providing a watermark secret ( 106 ), embedding ( 107 ) a digital watermark in an information signal ( 101 ) where said embedding is controlled by the watermark secret, calculating ( 102 ) a digital fingerprint ( 103 ) from the information signal, and storing ( 104 ) the calculated digital fingerprint as a reference digital fingerprint and storing, in relation to the reference digital fingerprint, a identifier data item from which the watermark secret can be derived.