ASYMMETRIC DIGITAL WATERMARKING METHOD WITH IMPROVED STABILITY

摘要

PURPOSE: An asymmetric digital watermarking method with improved stability is provided to increase the stability and reliability on the watermark detection, thereby increasing the protection of CONSTITUTION: An asymmetric digital watermarking method with improved stability includes the steps of generating source key set of orthogonal normal sequence, generating a secret key and a public key by the source key set and two random conversion matrixes in the inverse transpose relation, and supplying the public key to a detector and analyzing the correlation between a signal watermarked by the secret key and the public key.