Digital Signature based secure XML emails

XML has become one of the important standards for data exchange on web and uniform data model for data integration. For XML data, digital signature is applied to it, which is nothing but XML Digital Signature. XML Digital Signature can be said as a standard for signing the XML data or document and also to represent XML Dig-Sig in an XML format. The use of XML format in the email system ensures security and privacy in its transaction [3]. A higher level of security can be provided to the Digital Signature of our XML data by using XML Encryption [3]. It is a flexible methodology for representing encrypted data in XML format. XML encryption supports the signing of the whole document or the partial document [3].