anchor.diff:    +fingerprint+
   
   Parameters type::
  -  +DOMString[]+ hex values of SHA1 fingerprints of attestation certificates to
  -  match against.
  +[source, javascript]
  +----
  +dictionary FingerprintParameters {
  +  DOMString[] fingerprints;
  +}
  +----
  +The fingerprints field contains hex values of SHA1 fingerprints of attestation
  +certificates to match against.
   
   ===== x509Extension
   Match certificates by their extensions.
  
positive.code:   optional DOMString value;
  }
  ----
  
  
negative.code: ----
  dictionary Selector {
    DOMString type;
    optional dictionary parameters;
  }
  ----
  
  