http://www.w3.org/2010/xmlsec-ghc#rsaes-kem
http://www.w3.org/2010/xmlsec-ghc#ecies-kem
http://www.w3.org/2010/xmlsec-ghc#generic-hybrid
http://www.w3.org/2010/xmlsec-ghc#generic-hybrid
http://www.w3.org/2010/xmlsec-ghc#rsaes-kem
http://www.w3.org/2010/xmlsec-ghc#ecies-kem