diff --git a/adm/member_form.php b/adm/member_form.php
index bd7032072..adf4708c1 100644
--- a/adm/member_form.php
+++ b/adm/member_form.php
@@ -122,6 +122,11 @@ if(!isset($mb['mb_addr3'])) {
     sql_query(" ALTER TABLE {$g5['member_table']} ADD `mb_addr3` varchar(255) NOT NULL DEFAULT '' AFTER `mb_addr2` ", false);
 }
 
+// 중복가입 확인필드 추가
+if(!isset($mb['mb_dupinfo'])) {
+    sql_query(" ALTER TABLE {$g5['member_table']} ADD `mb_dupinfo` varchar(255) NOT NULL DEFAULT '' AFTER `mb_adult` ", false);
+}
+
 if ($mb['mb_intercept_date']) $g5['title'] = "차단된 ";
 else $g5['title'] .= "";
 $g5['title'] .= '회원 '.$html_title;
diff --git a/bbs/register_form_update.php b/bbs/register_form_update.php
index ae4d2ab98..ad79cfd28 100644
--- a/bbs/register_form_update.php
+++ b/bbs/register_form_update.php
@@ -148,12 +148,12 @@ if (isset($_FILES['mb_icon']) && is_uploaded_file($_FILES['mb_icon']['tmp_name']
 //  본인확인
 //---------------------------------------------------------------
 $mb_hp = hyphen_hp_number($mb_hp);
-if($_SESSION['ss_cert_type'] != 'hp' && $mb_hp) {
-    // 휴대폰번호 중복체크
-    $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_hp = '{$mb_hp}' ";
+if($config['cf_cert_use'] && $_SESSION['ss_cert_type'] && $_SESSION['ss_cert_dupinfo']) {
+    // 중복체크
+    $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$_SESSION['ss_cert_dupinfo']}' ";
     $row = sql_fetch($sql);
     if ($row['mb_id']) {
-        alert("이미 가입되어 있는 휴대폰번호 입니다.\\n회원아이디 : ".$row['mb_id']);
+        alert("입력하신 본인확인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
     }
 }
 
@@ -168,6 +168,7 @@ if ($config['cf_cert_use'] && $cert_type && $md5_cert_no) {
         $sql_certify .= " , mb_adult = '{$_SESSION['ss_cert_adult']}' ";
         $sql_certify .= " , mb_birth = '{$_SESSION['ss_cert_birth']}' ";
         $sql_certify .= " , mb_sex = '{$_SESSION['ss_cert_sex']}' ";
+        $sql_certify .= " , mb_dupinfo = '{$_SESSION['ss_cert_dupinfo']}' ";
     } else {
         $sql_certify .= " , mb_hp = '{$mb_hp}' ";
         $sql_certify .= " , mb_certify  = '' ";
diff --git a/css/default.css b/css/default.css
index 387c85abf..114accbed 100644
--- a/css/default.css
+++ b/css/default.css
@@ -31,7 +31,8 @@ a:hover, a:focus, a:active {color:#000;text-decoration:underline}
 .hd_pops_footer button {margin-right:5px;padding:5px 10px;border:0;background:#393939;color:#fff}
 
 /* 상단 레이아웃 */
-#hd {z-index:10;position:relative;min-width:970px;background:#fff}
+#hd {z-index:4;position:relative;min-width:970px;background:#fff}
+.hd_zindex {z-index:10 !important}
 #hd_h1 {position:absolute;font-size:0;line-height:0;overflow:hidden}
 #hd_wrapper {position:relative;margin:0 auto;padding:26px 0;width:970px;zoom:1}
 #hd_wrapper:after {display:block;visibility:hidden;clear:both;content:""}
@@ -204,7 +205,7 @@ a.btn_admin:focus, a.btn_admin:hover {text-decoration:none}
 /* 폼 테이블 */
 .tbl_frm01 {margin:0 0 20px}
 .tbl_frm01 table {width:100%;border-collapse:collapse;border-spacing:0}
-.tbl_frm01 th {width:100px;padding:7px 13px;border:1px solid #e9e9e9;border-left:0;background:#f5f8f9;text-align:left}
+.tbl_frm01 th {width:70px;padding:7px 13px;border:1px solid #e9e9e9;border-left:0;background:#f5f8f9;text-align:left}
 .tbl_frm01 td {padding:7px 10px;border-top:1px solid #e9e9e9;border-bottom:1px solid #e9e9e9;background:transparent}
 .tbl_frm01 textarea, .frm_input {border:1px solid #e4eaec;background:#f7f7f7;color:#000;vertical-align:middle;line-height:2em}
 .tbl_frm01 textarea {padding:2px 2px 3px}
diff --git a/install/gnuboard5.sql b/install/gnuboard5.sql
index c2f159ef8..e0e450f6b 100644
--- a/install/gnuboard5.sql
+++ b/install/gnuboard5.sql
@@ -452,6 +452,7 @@ CREATE TABLE IF NOT EXISTS `g5_member` (
   `mb_hp` varchar(255) NOT NULL default '',
   `mb_certify` varchar(20) NOT NULL default '',
   `mb_adult` tinyint(4) NOT NULL default '0',
+  `mb_dupinfo` varchar(255) NOT NULL default '',
   `mb_zip1` char(3) NOT NULL default '',
   `mb_zip2` char(3) NOT NULL default '',
   `mb_addr1` varchar(255) NOT NULL default '',
diff --git a/js/jquery.menu.js b/js/jquery.menu.js
index 7969c4a25..a05b03de6 100644
--- a/js/jquery.menu.js
+++ b/js/jquery.menu.js
@@ -18,6 +18,7 @@ $(function(){
     var $gnb = $(".gnb_1dli > a");
     $gnb.mouseover(function() {
         if(mouse_event) {
+            $("#hd").addClass("hd_zindex");
             $(".gnb_1dli").removeClass("gnb_1dli_over gnb_1dli_over2 gnb_1dli_on");
             $(this).parent().addClass("gnb_1dli_over gnb_1dli_on");
             menu_rearrange($(this).parent());
@@ -38,6 +39,7 @@ $(function(){
     });
 
     $gnb.focusin(function() {
+        $("#hd").addClass("hd_zindex");
         $(".gnb_1dli").removeClass("gnb_1dli_over gnb_1dli_over2 gnb_1dli_on");
         $(this).parent().addClass("gnb_1dli_over gnb_1dli_on");
         menu_rearrange($(this).parent());
@@ -71,6 +73,7 @@ $(function(){
 });
 
 function submenu_hide() {
+    $("#hd").removeClass("hd_zindex");
     $(".gnb_1dli").removeClass("gnb_1dli_over gnb_1dli_over2 gnb_1dli_on");
 }
 
diff --git a/plugin/kcpcert/kcpcert_result.php b/plugin/kcpcert/kcpcert_result.php
index fb642a557..a7e06a03f 100644
--- a/plugin/kcpcert/kcpcert_result.php
+++ b/plugin/kcpcert/kcpcert_result.php
@@ -134,11 +134,12 @@ if( $cert_enc_use == "Y" )
             alert_close("정상적인 인증이 아닙니다. 올바른 방법으로 이용해 주세요.");
 
         $phone_no = hyphen_hp_number($phone_no);
+        $mb_dupinfo = $di;
 
-        $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_hp = '{$phone_no}' ";
+        $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}' ";
         $row = sql_fetch($sql);
         if ($row['mb_id']) {
-            alert_close("이미 가입되어 있는 휴대폰번호 입니다.\\n회원아이디 : ".$row['mb_id']);
+            alert_close("입력하신 본인학인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
         }
 
         // hash 데이터
@@ -156,6 +157,7 @@ if( $cert_enc_use == "Y" )
         set_session("ss_cert_adult",   $adult);
         set_session("ss_cert_birth",   $birth_day);
         set_session("ss_cert_sex",     ($sex_code=="01"?"M":"F"));
+        set_session('ss_cert_dupinfo', $mb_dupinfo);
     }
     else if( $res_cd != "0000" )
     {
diff --git a/plugin/okname/hpcert2.php b/plugin/okname/hpcert2.php
index 3f5ed6d72..5a53777f6 100644
--- a/plugin/okname/hpcert2.php
+++ b/plugin/okname/hpcert2.php
@@ -95,13 +95,14 @@ echo "리턴메시지        :$field[16] <br/>";
 $mb_name = $field[7];
 $req_num = $field[12];
 $mb_birth = $field[8];
-
-// 휴대폰번호 중복체크
+$mb_dupinfo = $field[4];
 $phone_no = hyphen_hp_number($req_num);
-$sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_hp = '{$phone_no}' ";
+
+// 중복정보 체크
+$sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}' ";
 $row = sql_fetch($sql);
 if ($row['mb_id']) {
-    alert_close("이미 가입되어 있는 휴대폰번호 입니다.\\n회원아이디 : ".$row['mb_id']);
+    alert_close("입력하신 본인학인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
 }
 
 // hash 데이터
@@ -119,6 +120,7 @@ set_session('ss_cert_hash',    $hash_data);
 set_session('ss_cert_adult',   $adult);
 set_session('ss_cert_birth',   $mb_birth);
 set_session('ss_cert_sex',     ($field[9] == 1 ? 'M' : 'F'));
+set_session('ss_cert_dupinfo', $mb_dupinfo);
 
 $g5['title'] = 'KCB 휴대폰 본인확인';
 include_once(G5_PATH.'/head.sub.php');
diff --git a/plugin/okname/ipin2.php b/plugin/okname/ipin2.php
index 43dc61e02..dda65f104 100644
--- a/plugin/okname/ipin2.php
+++ b/plugin/okname/ipin2.php
@@ -67,6 +67,14 @@ $field_name_IPIN_DEC = array(
 $mb_name = $field[6];
 $req_num = $field[7];
 $mb_birth = $field[11];
+$mb_dupinfo = $field[0];
+
+// 중복정보 체크
+$sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}' ";
+$row = sql_fetch($sql);
+if ($row['mb_id']) {
+    alert_close("입력하신 본인확인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
+}
 
 // hash 데이터
 $cert_type = 'ipin';
@@ -82,6 +90,7 @@ set_session('ss_cert_hash',    $hash_data);
 set_session('ss_cert_adult',   $adult);
 set_session('ss_cert_birth',   $mb_birth);
 set_session('ss_cert_sex',     ($field[9] == 1 ? 'M' : 'F'));
+set_session('ss_cert_dupinfo', $mb_dupinfo);
 
 $g5['title'] = 'KCB 아이핀 본인확인';
 include_once(G5_PATH.'/head.sub.php');