2006-03-20 Apache Santuario Library implementing XML Digital Signature Specification & XML Encryption Specification Java C++ XML Security (Java) 1.4.4 2010-11 1.4.4 XML Security (C++) 1.5.1 2009-07 1.5.1 XML-Signature Syntax and Processing W3C XML Signature XML-Signature Syntax and Processing IETF 3275 Canonical XML W3C Canonical XML Exclusive XML Canonicalization W3C Exclusive XML Canonicalization XML Encryption Syntax and Processing W3C Exclusive XML Encryption