diff --git a/application/models/Participant.php b/application/models/Participant.php
index 3b0e1cf80f1..2cfeb10214d 100755
--- a/application/models/Participant.php
+++ b/application/models/Participant.php
@@ -327,13 +327,13 @@ public function getColumns()
                 'htmlOptions'       => ['class' => 'ls-sticky-column'],
             ],
             [
-                "name" => 'lastname'
+                "name" => 'lastname',
             ],
             [
-                "name" => 'firstname'
+                "name" => 'firstname',
             ],
             [
-                "name" => 'email'
+                "name" => 'email',
             ],
             [
                 "name"   => 'language',
@@ -417,6 +417,15 @@ public function getColumns()
      */
     public function search()
     {
+        $encryptedAttributes = $this->getParticipantsEncryptionOptions();
+        $encryptedAttributesColums = isset($encryptedAttributes) && isset($encryptedAttributes['columns'])
+            ? $encryptedAttributes['columns']
+            : [];
+        $encryptedAttributesColums = array_filter($encryptedAttributesColums, function ($column) {
+            return $column === 'Y';
+        });
+        $encryptedAttributesColums = array_keys($encryptedAttributesColums);
+
         $sort = new CSort();
         $sort->defaultOrder = 'lastname';
         $sortAttributes = array(
@@ -455,6 +464,14 @@ public function search()
         );
         $this->decryptEncryptAttributes('encrypt');
 
+        if (!empty($encryptedAttributesColums)) {
+            foreach ($encryptedAttributesColums as $encryptedColum) {
+                if (isset($sortAttributes[$encryptedColum])) {
+                    unset($sortAttributes[$encryptedColum]);
+                }
+            }
+        }
+
         $criteria = new CDbCriteria();
         $criteria->join = 'LEFT JOIN {{users}} as owner on uid=owner_uid LEFT JOIN {{participant_shares}} AS shares ON t.participant_id = shares.participant_id AND (shares.share_uid = ' . Yii::app()->user->id . ' OR shares.share_uid = -1)';
         $criteria->compare('t.participant_id', $this->participant_id, true, 'AND', true);