diff --git a/bbs/qawrite_update.php b/bbs/qawrite_update.php
index bf74ef3c7..d973e3c8e 100644
--- a/bbs/qawrite_update.php
+++ b/bbs/qawrite_update.php
@@ -223,7 +223,7 @@ for ($i=1; $i<=$upload_count; $i++) {
         $shuffle = implode('', $chars_array);
 
         // 첨부파일 첨부시 첨부파일명에 공백이 포함되어 있으면 일부 PC에서 보이지 않거나 다운로드 되지 않는 현상이 있습니다. (길상여의 님 090925)
-        $upload[$i]['file'] = abs(ip2long($_SERVER['REMOTE_ADDR'])).'_'.substr($shuffle,0,8).'_'.replace_filename($filename);
+        $upload[$i]['file'] = md5(sha1($_SERVER['REMOTE_ADDR'])).'_'.substr($shuffle,0,8).'_'.replace_filename($filename);
 
         $dest_file = G5_DATA_PATH.'/qa/'.$upload[$i]['file'];
 
diff --git a/bbs/write_update.php b/bbs/write_update.php
index 32c87cd66..08a568193 100644
--- a/bbs/write_update.php
+++ b/bbs/write_update.php
@@ -570,7 +570,7 @@ if(isset($_FILES['bf_file']['name']) && is_array($_FILES['bf_file']['name'])) {
             $shuffle = implode('', $chars_array);
 
             // 첨부파일 첨부시 첨부파일명에 공백이 포함되어 있으면 일부 PC에서 보이지 않거나 다운로드 되지 않는 현상이 있습니다. (길상여의 님 090925)
-            $upload[$i]['file'] = abs(ip2long($_SERVER['REMOTE_ADDR'])).'_'.substr($shuffle,0,8).'_'.replace_filename($filename);
+            $upload[$i]['file'] = md5(sha1($_SERVER['REMOTE_ADDR'])).'_'.substr($shuffle,0,8).'_'.replace_filename($filename);
 
             $dest_file = G5_DATA_PATH.'/file/'.$bo_table.'/'.$upload[$i]['file'];
 
diff --git a/mobile/skin/member/basic/register_form.skin.php b/mobile/skin/member/basic/register_form.skin.php
index 85d13accb..90f33137b 100644
--- a/mobile/skin/member/basic/register_form.skin.php
+++ b/mobile/skin/member/basic/register_form.skin.php
@@ -47,6 +47,8 @@ if ($config['cf_cert_use'] && ($config['cf_cert_simple'] || $config['cf_cert_ipi
         <ul>
             <li>
                 <?php 
+                $desc_name = '';
+                $desc_phone = '';
 	            if ($config['cf_cert_use']) {
                     $desc_name = ' - 본인확인 시 자동입력';
                     $desc_phone = ' - 본인확인 시 자동입력';
diff --git a/plugin/kcaptcha/kcaptcha_mp3.php b/plugin/kcaptcha/kcaptcha_mp3.php
index 67fa5c114..5672320a3 100644
--- a/plugin/kcaptcha/kcaptcha_mp3.php
+++ b/plugin/kcaptcha/kcaptcha_mp3.php
@@ -16,7 +16,7 @@ function make_mp3()
         $mp3s[] = $file;
     }
 
-    $ip = sprintf("%u", ip2long($_SERVER['REMOTE_ADDR']));
+    $ip = md5(sha1($_SERVER['REMOTE_ADDR']));
     $mp3_file = 'cache/kcaptcha-'.$ip.'_'.G5_SERVER_TIME.'.mp3';
 
     $contents = '';
diff --git a/skin/member/basic/register_form.skin.php b/skin/member/basic/register_form.skin.php
index 0e252688d..f8f73b6d3 100644
--- a/skin/member/basic/register_form.skin.php
+++ b/skin/member/basic/register_form.skin.php
@@ -53,6 +53,8 @@ if ($config['cf_cert_use'] && ($config['cf_cert_simple'] || $config['cf_cert_ipi
 	        <ul>
 				<li>
                     <?php 
+					$desc_name = '';
+					$desc_phone = '';
 	                if ($config['cf_cert_use']) {
                         $desc_name = '<span class="cert_desc"> 본인확인 시 자동입력</span>';
                         $desc_phone = '<span class="cert_desc"> 본인확인 시 자동입력</span>';
diff --git a/theme/basic/mobile/skin/member/basic/register_form.skin.php b/theme/basic/mobile/skin/member/basic/register_form.skin.php
index ed02a5999..534a63933 100644
--- a/theme/basic/mobile/skin/member/basic/register_form.skin.php
+++ b/theme/basic/mobile/skin/member/basic/register_form.skin.php
@@ -47,6 +47,8 @@ if ($config['cf_cert_use'] && ($config['cf_cert_simple'] || $config['cf_cert_ipi
         <ul>
             <li>
                 <?php 
+                $desc_name = '';
+                $desc_phone = '';
 	            if ($config['cf_cert_use']) {
                     $desc_name = ' - 본인확인 시 자동입력';
                     $desc_phone = ' - 본인확인 시 자동입력';
diff --git a/theme/basic/skin/member/basic/register_form.skin.php b/theme/basic/skin/member/basic/register_form.skin.php
index d7af6bce4..7b79c61f4 100644
--- a/theme/basic/skin/member/basic/register_form.skin.php
+++ b/theme/basic/skin/member/basic/register_form.skin.php
@@ -53,7 +53,9 @@ if ($config['cf_cert_use'] && ($config['cf_cert_simple'] || $config['cf_cert_ipi
 	        <ul>
 				<li>
                     <?php 
-	                if ($config['cf_cert_use']) {
+					$desc_name = '';
+					$desc_phone = '';
+					if ($config['cf_cert_use']) {
                         $desc_name = '<span class="cert_desc"> 본인확인 시 자동입력</span>';
                         $desc_phone = '<span class="cert_desc"> 본인확인 시 자동입력</span>';