Shivaram H. Mysore; Phillip Hallam-Baker. <a href="http://www.w3.org/TR/2005/REC-xkms2-20050628"><cite>XML Key Management Specification (XKMS 2.0).</cite></a> 28 June 2005. W3C Recommendation. URL: <a href="http://www.w3.org/TR/2005/REC-xkms2-20050628">http://www.w3.org/TR/2005/REC-xkms2-20050628</a>