Can Giovanni watermarks be removed once they have been encoded?
Yes, completely – but only with an authorized key. This simple concept is the differentiating feature between Giovanni and all other watermark systems. It is also the basis of the related intellectual property. Without a key, removal will damage the content that held the watermark, since the watermark is randomly embedded in the “perceptually significant” areas of the content. Further, even if attempts are made to erase the watermarks, digital signatures are included with the watermark message making tampering plainly evident with a “signature” check. The important consideration for content owners is the ability to authenticate content with the key and the watermarked media alone, making it unnecessary to authenticate with the original unwatermarked media. Content owners can then insist that copies of their content need to be authenticated with an authorized key in advance of any subsequent redistribution. The incorporation of digital signatures makes Giovanni a cryptographically secur
