Discourage Unique tracking IDs

index.html

@@ -1120,6 +1120,11 @@ <h3>Schema Resolution</h3>
              of an <a href="https://ietf-wg-ohai.github.io/oblivious-http/draft-ietf-ohai-ohttp.html#dfn-relay">Oblivious Relay Resource</a>
              for use during <a>schema resolution</a>.
            </p>
+           <p>
+             When using <a>credential schema</a> identifiers that are unique to the issued credential, it is possible
+             to correlate <a>schema resolution</a> of a credential with an IP address. Issuers are encouraged to prevent such
+             correlation by selecting identifiers which are shared among a class of credentials.
+           </p>
          </section>
       </section>
       <section class="informative">