ZoneMinder Forums

rdmelin wrote:Editing the jpeg will destroy the embedded information, so it can be used to demonstrate that the image hasn,t been tampered with.

Please read my posting above - what prevents you from simply recreating the embedded information after editing the jpeg?

I fail to see how this could work - if somebody modifies the recording, he can then simply regenerate the watermark, unless the watermarking algorithm is kept secret, which is impossible since ZoneMinder is open source. A site-specific secret (i.e. a variable parameter to the algorithm) will afford ...