Identifiers:
   http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha1
   http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha224
   http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha256
   http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha384
   http://www.w3.org/2001/04/xmldsig-more#ecdsa-sha512
   http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-224
   http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-256
   http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-384
   http://www.w3.org/2021/04/xmldsig-more#ecdsa-sha3-512
   http://www.w3.org/2007/05/xmldsig-more#ecdsa-ripemd160
   http://www.w3.org/2007/05/xmldsig-more#ecdsa-whirlpool