Mark Young

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XML signatures apply digital signatures to XML documents. Digital signatures let parties that exchange data ensure the identity of the sender and the integrity of the data. This last item is a benefit that physical signatures can't provide. Digital signatures don't have the legal status that physical signatures have, at least not yet. Over the last few years this has been changing, as the federal government and many state governments have moved to accept digital signatures as legally binding for some applications, where they identify the sender and provide nonrepudiation (the signer can't deny ever having signed). Since Web services that use SOAP exchange XML documents, they can include XML signatures. Web service developers who produce Web services with XML signatures will be able to realize the benefits of those signatures, and may be able to use them in place of... (more)