Add at risk issue marker for selective disclosure functions.

index.html

@@ -731,7 +731,16 @@ <h4>Proof Verification (ecdsa-2019)</h4>
       </section>
 
       <section>
-        <h4>Selective Disclosure Primitives</h4>
+        <h4>Selective Disclosure Functions</h4>
+
+        <p class="issue" title="(AT RISK) Pending implementation feedback and security reviews.">
+The Working Group is seeking implementer feedback on these generalized selective
+disclosure functions as well as horizonal security review on the features from
+parties at W3C and IETF. Those reviews might result in significant changes to
+these functions, migration of these functions to the core Data Integrity
+specification (for use by other cryptographic suites), or the removal of the
+algorithm from the specification during the Candidate Recommendation phase.
+        </p>
 
         <p>
 The following section contains a set of functions that are used throughout