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What is the purpose of producing an image hash of an image in which a cryptographically secure invisible watermark is to be embedded?

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Aishwarya Rajan
Aishwarya Rajan el 17 de Mzo. de 2017
Cerrada: Walter Roberson el 17 de Mzo. de 2017
I have tried to develop a code using SHA algorithm as the hashing algorithm, along with a DES encrypted watermark.. And while doing the LSB embedding, how would the pixel values be replaced? would the value of the image Hash play any role in it?

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