(a)
 <root>
 ...
 <Element Attr1="Value1" Attr2="Value2" Attr3="Value3">
 ...
 </Element>
 ...
 </root>

(b)
 <root>
 ...
 <EncryptionInfo
 xmlns=http://www.w3.org/2001/03/Encryption
 Id="encryptionInfo23" ...>
 </EncryptionInfo>
 ...
 <Element Attr1="Value1" Attr2="Value2" Attr3="Value3">
        <EncryptedNode
 xmlns=http://www.w3.org/2001/03/Encryption
        NodeType="ElementContent"
        EncryptionInfo="#encryptionInfo23">
 (Base64 of encrypted element content)
        </EncryptedNode>
 </Element>
 ...
 </root>