How do I sign everything related to what the user was looking at when s/he signed?
• This can be quite application-specific. If an application s document format already maintains both the data and the information about how to render it, then the signature need only be made to cover all of the relevant elements in the given document. • If the application separates the data and rendering information into separate files, such as XML markup for the data plus an XSL stylesheet, then there are two solutions. • Two SignedInfo References, one to data and one to the rendering information. • If the rendering information is specifically an XSL stylesheet, then the XSLT transform could be used and the resulting document could be signed.
