Merge pull request simonfrey#16 from nicholas-gh/patch-1

Replaces mention of posener/sharedsecret with hashicorp/vault to catc…

frontend/index.html

@@ -60,8 +60,8 @@ <h3 class="subtitle">About s4</h3>
                         works completely offline. Save it to your computer (Ctrl+S) in order to not lose access to the
                         s4 in case this website will be down at any point in the future.</p>
                     <p> Please note that s4 is provided as it is and I do not take responsibility for any bugs. s4 is a
-                        tiny layer around <a href="https://github.com/posener/sharedsecret"
-                            target="_blank">sharedsecret</a> and golangs <a
+                        tiny layer around <a href="https://github.com/hashicorp/vault"
+                            target="_blank">hashicorp vault shamir</a> and golangs <a
                             href="https://github.com/gtank/cryptopasta/blob/master/encrypt.go" target="_blank">AES
                             encryption</a>.</p>
                     <p>If you find any issues, please report them via <a href="https://github.com/simonfrey/s4/issues"
@@ -142,4 +142,4 @@ <h3 class="subtitle">About s4</h3>
 
 </body>
 
-</html>
+</html>