Importance

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Abstract

A web page is published with a digital signature. The web server verifies the digital signature at runtime before sending the page over a network to a client. If the signature does not match to the document content (e.g., the decrypted document content that had been previously encoded during the signing process does not match the original never encoded clear document content), the server stops serving the page and provides an indication, such as notifying the system administrator and/or the client. The client browser also can check the signature when it gets the page. The client browser can refuse to render the page and warn the user if the digital signature does not match to the document content.

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First Claim