diff --git a/conf/app.php b/conf/app.php
index 908b468..c84836e 100644
--- a/conf/app.php
+++ b/conf/app.php
@@ -43,6 +43,9 @@ return array(
         'contact' => 'FileSite视频网站订制联系：<a href="https://filesite.io" target="_blank">FileSite.io</a>',
     ),
 
+    //md5加密前缀
+    'md5Prefix' => 'some_code_here',
+
     //后台管理相关配置
     'admin' => array(
         'username' => 'filesite',
diff --git a/controller/ApiController.php b/controller/ApiController.php
index e14a0cf..9e50589 100644
--- a/controller/ApiController.php
+++ b/controller/ApiController.php
@@ -365,7 +365,7 @@ Class ApiController extends Controller {
 
         $ip = $this->getUserIp();
         $logDir = __DIR__ . '/../runtime/admin/';
-        $logFile = "{$logDir}{$ip}.cache";
+        $logFile = "{$logDir}" . md5(FSC::$app['config']['md5Prefix'] . $ip) . ".cache";
 
         try {
             if (file_exists($logFile)) {
@@ -379,7 +379,7 @@ Class ApiController extends Controller {
     protected function saveAdmUserData($data) {
         $ip = $this->getUserIp();
         $logDir = __DIR__ . '/../runtime/admin/';
-        $logFile = "{$logDir}{$ip}.cache";
+        $logFile = "{$logDir}" . md5(FSC::$app['config']['md5Prefix'] . $ip) . ".cache";
         if (!is_dir($logDir)) {      //try to mkdir
             @mkdir($logDir, 0700, true);
         }