diff --git a/admin/admin.inc.php b/admin/admin.inc.php
index 34f6356..f503110 100755
--- a/admin/admin.inc.php
+++ b/admin/admin.inc.php
@@ -572,14 +572,14 @@ auto_delete(); //定时删除
                         <div class="form-group">
                             <label for="logDate" class="text-primary">月份: </label>
                             <input type="text" class="form-control logDate" id="logDate" name="logDate" value="<?php echo date('Y-m'); ?>" required="required" readonly>
-                            <input type="hidden" class="form-control" name="pass" value="<?php echo md5($config['password'] . date('ymdh')); ?>" placeholder="日志访问秘钥">
+                            <input type="hidden" class="form-control" name="sign" value="<?php echo md5($config['password'] . date('ymdh')); ?>" placeholder="日志访问秘钥">
                         </div>
                         <button type="submit" class="btn btn-primary">查看</button>
                     </form>
                 </div>
                 <div class="col-md-2">
                     <h5 class="header-dividing">登录日志 <small>仅显示当月</small></h5>
-                    <button type="button" class="btn btn-primary" data-toggle="modal" data-title="登录日志 - 仅显示当月" data-icon="book" data-moveable="true" data-width="60%" data-type="ajax" data-url="../application/viewlog.php?login_log&pass=<?php echo md5($config['password'] . date('ymdh')); ?>">查看</button>
+                    <button type="button" class="btn btn-primary" data-toggle="modal" data-title="登录日志 - 仅显示当月" data-icon="book" data-moveable="true" data-width="60%" data-type="ajax" data-url="../application/viewlog.php?login_log&sign=<?php echo md5($config['password'] . date('ymdh')); ?>">查看</button>
                 </div>
                 <div class="col-md-3">
                     <h5 class="header-dividing" data-toggle="tooltip" title="仅限存储分类路径为 Y/m/d/ 格式<br/>且每天需要访问一次后台才执行<br/>先重命名要删除文件夹作为备份<br/>超过定时日期的2倍后再彻底删除重命名的文件夹<br/>超过定时日期前和开启分离的文件夹不删除">定时删除 <small>数值为<code>0</code>时关闭</small></h5>
diff --git a/api/index.php b/api/index.php
index 5b179ef..cac39a8 100755
--- a/api/index.php
+++ b/api/index.php
@@ -167,24 +167,24 @@ if ($handle->uploaded) {
 
         // 上传成功后返回json数据
         $reJson = array(
-            "result"    => "success",
-            "code"      => 200,
-            "url"       => $imageUrl,
-            "srcName"   => $handle->file_src_name_body,
-            "thumb"     => $handleThumb,
-            "del"       => $delUrl,
-            "ID"        => $tokenID, // 202-02-11 增加返回Token ID
-            // "memory"    => getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
+            "result"  => "success",
+            "code"    => 200,
+            "url"     => $imageUrl,
+            "srcName" => $handle->file_src_name_body,
+            "thumb"   => $handleThumb,
+            "del"     => $delUrl,
+            "ID"      => $tokenID, // 202-02-11 增加返回Token ID
+            // "memory" => getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
         );
         echo json_encode($reJson, JSON_UNESCAPED_UNICODE);
         $handle->clean();
     } else {
         // 上传错误 code:206 客户端文件有问题
         $reJson = array(
-            "result"    =>  "failed",
-            "code"      =>  206,
-            "message"   =>  $handle->error,
-            "memory"    =>  getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
+            "result"  => "failed",
+            "code"    => 206,
+            "message" => $handle->error,
+            "memory"  => getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
             // 'log' => $handle->log, // 仅用作调试用
         );
         unset($handle);
@@ -202,9 +202,9 @@ if ($handle->uploaded) {
         @write_upload_logs($pathIMG, $handle->file_src_name, $handle->file_dst_pathname, $handle->file_src_size, $tokenID);
         // 鉴黄
         @process_checkImg($processUrl);
-        // 水印        
+        // 水印
         @water($handle->file_dst_pathname);
-        // 压缩        
+        // 压缩
         @process_compress($handle->file_dst_pathname);
     } else { // 普通模式
         // 记录同IP上传次数
diff --git a/application/upload.php b/application/upload.php
index 6b91cae..21eb72f 100755
--- a/application/upload.php
+++ b/application/upload.php
@@ -9,9 +9,9 @@ require __DIR__ . '/class.upload.php';
 if ($config['mustLogin']) {
     if (!is_who_login('status')) {
         exit(json_encode(array(
-            "result"    =>  "failed",
-            "code"      =>  401,
-            "message"   =>  "本站已开启登陆上传,您尚未登陆",
+            "result"  => "failed",
+            "code"    => 401,
+            "message" => "本站已开启登陆上传,您尚未登陆",
         )));
     }
 }
@@ -20,21 +20,30 @@ if ($config['mustLogin']) {
 if (empty($_FILES['file'])) {
     exit(json_encode(
         array(
-            "result"    =>  "failed",
-            "code"      =>  204,
-            "message"   =>  "没有选择上传的文件",
+            "result"  => "failed",
+            "code"    => 204,
+            "message" => "没有选择上传的文件",
         )
     ));
 }
 
+// sign
+if (empty($_POST['sign']) || $_POST['sign'] !== md5($config['password'] . date('YmdH'))) {
+    exit(json_encode(array(
+        "result"  => "failed",
+        "code"    => 403,
+        "message" => "签名错误,请刷新重试",
+    )));
+}
+
 // 黑/白IP名单上传
 if ($config['check_ip']) {
     if (checkIP(null, $config['check_ip_list'], $config['check_ip_model'])) {
         // 上传错误 code:403 未授权IP
         exit(json_encode(array(
-            "result"    =>  "failed",
-            "code"      =>  403,
-            "message"   =>  "黑名单内或白名单外用户不允许上传",
+            "result"  => "failed",
+            "code"    => 403,
+            "message" => "黑名单内或白名单外用户不允许上传",
         )));
     }
 }
@@ -182,12 +191,12 @@ if ($handle->uploaded) {
 
         // 上传成功后返回json数据
         $reJson = array(
-            "result"    => "success",
-            "code"      => 200,
-            "url"       => $imageUrl,
-            "srcName"   => $handle->file_src_name_body,
-            "thumb"     => $handleThumb,
-            "del"       => $delUrl,
+            "result"  => "success",
+            "code"    => 200,
+            "url"     => $imageUrl,
+            "srcName" => $handle->file_src_name_body,
+            "thumb"   => $handleThumb,
+            "del"     => $delUrl,
             // "memory"    => getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
         );
         echo json_encode($reJson);
@@ -195,10 +204,10 @@ if ($handle->uploaded) {
     } else {
         // 上传错误 code:206 客户端文件有问题
         $reJson = array(
-            "result"    =>  "failed",
-            "code"      =>  206,
-            "message"   =>  $handle->error,
-            "memory"    => getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
+            "result"  =>  "failed",
+            "code"    =>  206,
+            "message" =>  $handle->error,
+            "memory"  => getDistUsed(memory_get_peak_usage()), // 占用内存 2023-02-12
             // 'log' => $handle->log, // 仅用作调试用
         );
         unset($handle);
diff --git a/application/viewlog.php b/application/viewlog.php
index 06918f4..bfc7d21 100644
--- a/application/viewlog.php
+++ b/application/viewlog.php
@@ -9,7 +9,7 @@ require_once __DIR__ . '/function.php';
 // 非管理员不可访问!
 if (!is_who_login('admin')) exit('Permission denied');
 // 禁止直接访问
-if (empty($_REQUEST['pass']) || $_REQUEST['pass'] !== md5($config['password'] . date('ymdh'))) exit('Authentication error!');
+if (empty($_REQUEST['sign']) || $_REQUEST['sign'] !== md5($config['password'] . date('ymdh'))) exit('Authentication error!');
 
 // 登录日志
 if (isset($_GET['login_log'])) {
diff --git a/docs/update.md b/docs/update.md
index 6c51a6a..c2a3dd2 100644
--- a/docs/update.md
+++ b/docs/update.md
@@ -1,4 +1,7 @@
-* 2023-03-05 v2.7.7 dev
+* 2023-03-06 v2.7.8
+- 增加前端上传签名
+
+* 2023-03-05 v2.7.7
 - 增加登录日志
 - 修复备用文件管理登录失效
 
diff --git a/index.php b/index.php
index 2918cdc..70af5eb 100755
--- a/index.php
+++ b/index.php
@@ -128,6 +128,10 @@ mustLogin();
     flash_swf_url: '<?php static_cdn(); ?>/public/static/zui/lib/uploader/Moxie.swf',
     // silverlight 上传组件地址
     flash_swf_url: '<?php static_cdn(); ?>/public/static/zui/lib/uploader/Moxie.xap',
+    // sign
+    multipart_params: {
+      'sign': '<?php echo md5($config['password'] . date('YmdH')); ?>', // new Date().format("YYYYMMddhh")
+    },
     // 预览图尺寸
     previewImageSize: {
       'width': 80,