diff --git a/iacr/api/papers.php b/iacr/api/papers.php
index da36f0ed7..70db80e94 100644
--- a/iacr/api/papers.php
+++ b/iacr/api/papers.php
@@ -8,7 +8,7 @@
   showError('Unauthenticated request');
   exit;
 }
-$msg = get_conf_message($Opt['dbName'], $Opt['iacrType'], $Opt['year']);
+$msg = $Opt['shortName'] . ':' . $Opt['iacrType'];
 
 if (!validate_hmac($_GET['auth'], $msg)) {
   showError('Bad auth token');