diff --git a/adm/config_form_update.php b/adm/config_form_update.php
index 1d5f8244a..796a19829 100644
--- a/adm/config_form_update.php
+++ b/adm/config_form_update.php
@@ -282,7 +282,7 @@ $sql = " update {$g5['config_table']}
                 cf_cert_hp = '{$_POST['cf_cert_hp']}',
                 cf_cert_sa = '{$_POST['cf_cert_sa']}',
                 cf_cert_kg_cd = '{$_POST['cf_cert_kg_cd']}',
-                cf_cert_kg_mid = '{$_POST['cf_cert_kg_mid']}',
+                cf_cert_kg_mid = '".trim($_POST['cf_cert_kg_mid'])."',
                 cf_cert_kcb_cd = '{$_POST['cf_cert_kcb_cd']}',
                 cf_cert_kcp_cd = '{$_POST['cf_cert_kcp_cd']}',
                 cf_lg_mid = '{$_POST['cf_lg_mid']}',
diff --git a/bbs/member_cert_refresh_update.php b/bbs/member_cert_refresh_update.php
index d2fa05a47..078e0f8f7 100644
--- a/bbs/member_cert_refresh_update.php
+++ b/bbs/member_cert_refresh_update.php
@@ -7,9 +7,11 @@ if (!($w == '' || $w == 'u')) {
     alert('w 값이 제대로 넘어오지 않았습니다.');
 }
 
-if($w == '')
+if($w == '') {
     $mb_id = isset($_POST['mb_id']) ? trim($_POST['mb_id']) : '';
-else
+    $mb_name = isset($_POST['mb_name']) ? trim($_POST['mb_name']) : '';
+    $mb_hp = isset($_POST['mb_hp']) ? trim($_POST['mb_hp']) : '';
+} else
     alert('잘못된 접근입니다', G5_URL);
 
 if(!$mb_id)
@@ -23,7 +25,7 @@ if($config['cf_cert_use'] && get_session('ss_cert_type') && get_session('ss_cert
     // 중복체크
     $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '".get_session('ss_cert_dupinfo')."' ";
     $row = sql_fetch($sql);
-    if ($row['mb_id']) {
+    if (!empty($row['mb_id'])) {
         alert("입력하신 본인확인 정보로 가입된 내역이 존재합니다.");
     }
 }
@@ -41,8 +43,7 @@ if ($config['cf_cert_use'] && $cert_type && $md5_cert_no) {
         $sql_certify .= " , mb_birth = '".get_session('ss_cert_birth')."' ";
         $sql_certify .= " , mb_sex = '".get_session('ss_cert_sex')."' ";
         $sql_certify .= " , mb_dupinfo = '".get_session('ss_cert_dupinfo')."' ";
-        if($w == 'u')
-            $sql_certify .= " , mb_name = '{$mb_name}' ";
+        $sql_certify .= " , mb_name = '{$mb_name}' ";
     } else {
         $sql_certify .= " mb_hp = '{$mb_hp}' ";
         $sql_certify .= " , mb_certify  = '' ";
diff --git a/bbs/password_reset_update.php b/bbs/password_reset_update.php
index e6299f092..f9aafebc1 100644
--- a/bbs/password_reset_update.php
+++ b/bbs/password_reset_update.php
@@ -1,7 +1,6 @@
 <?php
 include_once('./_common.php');
-global $g5;
-$_POST['mb_id'];
+
 if($w == '')
     $mb_id = isset($_POST['mb_id']) ? trim($_POST['mb_id']) : '';
 else
@@ -23,6 +22,6 @@ $sql_password = "";
 if ($mb_password)
     $sql_password = "mb_password = '".get_encrypt_string($mb_password)."' ";
 
-sql_fetch("update {$g5['member_table']} set {$sql_password} where mb_id = '{$mb_id}'");
+sql_query("update {$g5['member_table']} set {$sql_password} where mb_id = '{$mb_id}'");
 
 goto_url(G5_BBS_URL.'/login.php');
\ No newline at end of file
diff --git a/bbs/register_form_update.php b/bbs/register_form_update.php
index 4d79cee6a..76b3ca1e8 100644
--- a/bbs/register_form_update.php
+++ b/bbs/register_form_update.php
@@ -166,7 +166,7 @@ if($config['cf_cert_use'] && get_session('ss_cert_type') && get_session('ss_cert
     // 중복체크
     $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '".get_session('ss_cert_dupinfo')."' ";
     $row = sql_fetch($sql);
-    if ($row['mb_id']) {
+    if (!empty($row['mb_id'])) {
         alert("입력하신 본인확인 정보로 가입된 내역이 존재합니다.");
     }
 }
diff --git a/common.php b/common.php
index 9f512e330..6a01c430d 100644
--- a/common.php
+++ b/common.php
@@ -300,6 +300,7 @@ if( !function_exists('shop_check_is_pay_page') ){
             $mobile_dir.'/'.$shop_dir.'/kcp/order_approval_form.php',
             $shop_dir.'/kakaopay/inicis_kk_return.php',     // 이니시스 카카오페이 (SIRK 로 시작하는 아이디 전용)
             $plugin_dir."/kgcert/kg_result.php", // 이니시스 통합인증 모듈 2021-09-10 http <-> https 간 세션 공유 문제로 인해 추가
+            $plugin_dir."/kgcert/kg_find_result.php", // 이니시스 통합인증 모듈 2021-09-10 http <-> https 간 세션 공유 문제로 인해 추가
         );
 
         $server_script_name = str_replace('\\', '/', $_SERVER['SCRIPT_NAME']);
@@ -792,7 +793,7 @@ if(!empty($extend_file) && is_array($extend_file)) {
 }
 unset($extend_file);
 
-if(!$is_admin && $is_member && !G5_CERT_IN_PROG && $config['cf_cert_use'] <> 0 && $config['cf_cert_req']) { // 본인인증이 필수일때
+if(!$is_admin && $is_member && (!defined("G5_CERT_IN_PROG") || !G5_CERT_IN_PROG) && $config['cf_cert_use'] <> 0 && $config['cf_cert_req']) { // 본인인증이 필수일때
     if ((empty($member['mb_certify']) || (!empty($member['mb_certify']) && strlen($member['mb_dupinfo']) == 64))) { // di로 인증되어 있거나 본인인증이 안된 계정일때
         goto_url(G5_BBS_URL."/member_cert_refresh.php");
     }
diff --git a/config.php b/config.php
index d92d16f27..24ab316bf 100644
--- a/config.php
+++ b/config.php
@@ -135,7 +135,7 @@ define('G5_PHPMAILER_PATH', G5_PLUGIN_PATH.'/'.G5_PHPMAILER_DIR);
 //------------------------------------------------------------------------------
 define('G5_SET_DEVICE', 'both');
 
-define('G5_CERT_IN_PROG', false); // 재인증페이지 리디렉션 사용여부
+// define('G5_CERT_IN_PROG', false); // 재인증페이지 리디렉션 사용여부
 define('G5_USE_MOBILE', true); // 모바일 홈페이지를 사용하지 않을 경우 false 로 설정
 define('G5_USE_CACHE',  true); // 최신글등에 cache 기능 사용 여부
 
diff --git a/mobile/skin/member/basic/register_cert_reset.skin.php b/mobile/skin/member/basic/register_cert_reset.skin.php
index 7031fe379..d2d7045f1 100644
--- a/mobile/skin/member/basic/register_cert_reset.skin.php
+++ b/mobile/skin/member/basic/register_cert_reset.skin.php
@@ -37,7 +37,7 @@ add_stylesheet('<link rel="stylesheet" href="' . $member_skin_url . '/style.css"
                                 <td colspan="2">이용자 식별 및 본인여부 확인</td>
                             </tr>
                             <tr>
-                                <td>생년월일<?php echo ($config['mb'])? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
+                                <td>생년월일<?php echo (empty($member['mb_dupinfo']))? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
                                 <td>회원 탈퇴 시까지</td>
                             </tr>
                         </tbody>
diff --git a/mobile/skin/member/basic/register_form.skin.php b/mobile/skin/member/basic/register_form.skin.php
index 89bb047c6..a8aacd3e0 100644
--- a/mobile/skin/member/basic/register_form.skin.php
+++ b/mobile/skin/member/basic/register_form.skin.php
@@ -125,7 +125,7 @@ add_stylesheet('<link rel="stylesheet" href="'.$member_skin_url.'/style.css">',
 	        <?php if ($config['cf_use_tel']) { ?>
 	        <li>
 	            <label for="reg_mb_tel" class="sound_only">전화번호<?php if ($config['cf_req_tel']) { ?><strong>필수</strong><?php } ?></label>
-	            <input type="text" name="mb_tel" value="<?php echo get_text($member['mb_tel']) ?>" id="reg_mb_tel" class="frm_input full_input <?php echo $config['cf_req_tel']?"required":""; ?>" maxlength="20" <?php echo $config['cf_req_tel']?"required":""; ?> placeholder="전화번호">
+	            <input type="text" name="mb_tel" value="<?php echo get_text($member['mb_tel']) ?>" id="reg_mb_tel" class="frm_input full_input <?php echo $config['cf_req_tel']?"required":""; ?>" <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa']) && $member['mb_certify']) { echo "readonly"; } ?> maxlength="20" <?php echo $config['cf_req_tel']?"required":""; ?> placeholder="전화번호">
 	        </li>
 	        <?php } ?>
 	
diff --git a/plugin/kcpcert/find_kcpcert_result.php b/plugin/kcpcert/find_kcpcert_result.php
index 62897faab..328f8cee0 100644
--- a/plugin/kcpcert/find_kcpcert_result.php
+++ b/plugin/kcpcert/find_kcpcert_result.php
@@ -153,9 +153,9 @@ if( $cert_enc_use == "Y" )
         $md5_ci = md5($ci.$ci);
 
         $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$md5_ci}'"); // ci데이터로 찾음
-        if (!$row['mb_id']) { // ci로 등록된 계정이 없다면
+        if (empty($row['mb_id'])) { // ci로 등록된 계정이 없다면
             $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}'"); // di데이터로 찾음
-            if (!$row['mb_id']) { // di로 등록된 계정도 없다면
+            if (empty($row['mb_id'])) { // di로 등록된 계정도 없다면
                 alert_close("인증하신 정보로 가입된 회원정보가 없습니다.");
                 exit;
             }
diff --git a/plugin/kcpcert/kcpcert_form.php b/plugin/kcpcert/kcpcert_form.php
index 5270b4a31..628f70a79 100644
--- a/plugin/kcpcert/kcpcert_form.php
+++ b/plugin/kcpcert/kcpcert_form.php
@@ -9,10 +9,12 @@ setlocale(LC_CTYPE, 'ko_KR.euc-kr');
 switch($_GET['pageType']){ // 페이지 타입 체크
     case "register":
         $resultPage = "/kcpcert_result.php";
-    break;
+        break;
     case "find":
         $resultPage = "/find_kcpcert_result.php";
-    break;
+        break;
+    default:
+        alert_close('잘못된 접근입니다.');
 }
 
 // kcp 휴대폰인증파일
diff --git a/plugin/kcpcert/kcpcert_result.php b/plugin/kcpcert/kcpcert_result.php
index a3a911d9a..8b3175d08 100644
--- a/plugin/kcpcert/kcpcert_result.php
+++ b/plugin/kcpcert/kcpcert_result.php
@@ -153,7 +153,7 @@ if( $cert_enc_use == "Y" )
 
         $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}' ";
         $row = sql_fetch($sql);
-        if ($row['mb_id']) {
+        if (!empty($row['mb_id'])) {
             alert_close("입력하신 본인확인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
         }
 
diff --git a/plugin/kgcert/kg_find_result.php b/plugin/kgcert/kg_find_result.php
index 7d3570e3d..77de6cf6e 100644
--- a/plugin/kgcert/kg_find_result.php
+++ b/plugin/kgcert/kg_find_result.php
@@ -46,7 +46,7 @@
             $mb_dupinfo = $md5_ci;
     
             $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}'"); // ci데이터로 찾음
-            if(!$row['mb_id']) { // ci로 등록된 계정이 없다면
+            if(empty($row['mb_id'])) { // ci로 등록된 계정이 없다면
                 alert_close("인증하신 정보로 가입된 회원정보가 없습니다.");
                 exit;                
             }
diff --git a/plugin/kgcert/kg_request.php b/plugin/kgcert/kg_request.php
index a754a7495..f93dea495 100644
--- a/plugin/kgcert/kg_request.php
+++ b/plugin/kgcert/kg_request.php
@@ -1,7 +1,6 @@
 <?php
 	include_once('./_common.php');
-	global $g5;
-
+	
 	if($_GET['directAgency'] == "KFTC") alert_close("서비스 준비중입니다.");
 
     $sql = "select MAX(cr_id) as max_cr_id from {$g5['cert_history_table']} limit 1";
@@ -9,15 +8,15 @@
 	$max_cr_id = $res['max_cr_id'];
 	if(empty($max_cr_id)) $max_cr_id = 0;
 	
-	if($config['cf_cert_use'] == 2) { // 테스트 일때
+	if($config['cf_cert_use'] == 2) { // 실서비스 일때
+		$mid = 'SRA'.$config['cf_cert_kg_mid']; // 부여받은 MID(상점ID) 입력(영업담당자 문의)
+		$apiKey = $config['cf_cert_kg_cd'];   // 부여받은 MID 에 대한 apiKey
+		$mTxId ='SIR_'.$max_cr_id;
+		certify_count_check($member['mb_id'], 'sa'); // 금일 인증시도 횟수 체크
+	} else { // 테스트 일때
 		$mid = "INIiasTest";
 		$apiKey = "TGdxb2l3enJDWFRTbTgvREU3MGYwUT09";
 		$mTxId ='test_'.$max_cr_id;
-	} else {
-		$mid = 'SRA'.$config['cf_cert_kg_mid']; // 부여받은 MID(상점ID) 입력(영업담당자 문의)
-		$apiKey = $config['cf_cert_kg_cd'];   // 부여받은 MID 에 대한 apiKey
-		$mTxId ='SIR_'.$max_cr_id.$type;
-		certify_count_check($member['mb_id'], 'sa'); // 금일 인증시도 횟수 체크
 	}	
 	$reqSvcCd ='01';
 
@@ -27,6 +26,12 @@
 
 	$flgFixedUser = (!empty($member['mb_id']) && !empty($member['mb_name']) && !empty($member['mb_hp']) && !empty($member['mb_birth']))?  'Y' : 'N';  // 특정사용자 고정시 : Y 세팅및 아래 해시 데이터 생성
 
+	// php8버전 값체크 경고 때문에 필수값이 아닌 값이 없을수 있는 선택값들은 선언해주어야함
+	$userName = '';
+	$userPhone = '';
+	$userBirth = '';
+	$userHash = '';	
+
 	if($flgFixedUser == 'Y') {
 		$userName = $member['mb_name'];            // 사용자 이름
 		$userPhone = preg_replace("/-/","" , $member['mb_hp']);   // 사용자 전화번호 하이픈만 제거
@@ -38,14 +43,15 @@
 	switch($_GET['pageType']){		
 		case "register":
 			$resultPage = "/kg_result.php";
-		break;
+			break;
 		case "find":
 			$resultPage = "/kg_find_result.php";
-		break;
+			break;
+		default:
+        	alert_close('잘못된 접근입니다.');
 	}
 	
 	$resultUrl = G5_KGCERT_URL . $resultPage;
-	
 	$g5['title'] = 'KG이니시스 통합인증';
 	include_once(G5_PATH.'/head.sub.php'); 	
 ?>
diff --git a/plugin/kgcert/kg_result.php b/plugin/kgcert/kg_result.php
index 3faf884f4..7cc5b74d3 100644
--- a/plugin/kgcert/kg_result.php
+++ b/plugin/kgcert/kg_result.php
@@ -30,7 +30,7 @@
         //  echo '<결과내역>'." '{$mid}' <br/><br/>";
         //  echo $response;
 
-        if($res_data['resultCode'] == "0000") {
+        if($res_data['resultCode'] === "0000") {
 
             @insert_cert_history($member['mb_id'], 'kg', 'sa'); // 인증성공 시 내역 기록
 
@@ -50,7 +50,7 @@
 
             $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}' ";
             $row = sql_fetch($sql);
-            if ($row['mb_id']) {
+            if (!empty($row['mb_id'])) {
                 alert_close("입력하신 본인확인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
             }
 
@@ -83,7 +83,7 @@
     }
 
     $g5['title'] = 'KG이니시스 통합인증 결과';
-    include_once(G5_PATH.'/head.sub.php'); 
+    include_once(G5_PATH.'/head.sub.php');
 ?>    
 <script>
     jQuery(function($) {        
diff --git a/plugin/lgxpay/AuthOnlyReq.php b/plugin/lgxpay/AuthOnlyReq.php
index 3ebcac3c9..d0f3a170f 100644
--- a/plugin/lgxpay/AuthOnlyReq.php
+++ b/plugin/lgxpay/AuthOnlyReq.php
@@ -7,10 +7,12 @@ certify_count_check($member['mb_id'], 'hp');
 switch($_GET['pageType']){ // 페이지 타입 체크
     case "register":
         $resultPage = "/AuthOnlyRes.php";
-    break;
+        break;
     case "find":
         $resultPage = "/find_AuthOnlyRes.php";
-    break;
+        break;    
+    default:
+        alert_close('잘못된 접근입니다.');
 }
 
 /*
diff --git a/plugin/lgxpay/find_AuthOnlyRes.php b/plugin/lgxpay/find_AuthOnlyRes.php
index c4f69fc79..a3140ef55 100644
--- a/plugin/lgxpay/find_AuthOnlyRes.php
+++ b/plugin/lgxpay/find_AuthOnlyRes.php
@@ -130,9 +130,9 @@ if ($xpay->TX()) {
         $md5_ci = md5($ci.$ci);
 
         $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$md5_ci}'"); // ci데이터로 찾음
-        if (!$row['mb_id']) { // ci로 등록된 계정이 없다면
+        if (empty($row['mb_id'])) { // ci로 등록된 계정이 없다면
             $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}'"); // di데이터로 찾음
-            if(!$row['mb_id']) {
+            if(empty($row['mb_id'])) {
                 alert_close("인증하신 정보로 가입된 회원정보가 없습니다.");
                 exit;
             }
diff --git a/plugin/okname/find_hpcert2.php b/plugin/okname/find_hpcert2.php
index ffd4aac09..de14f7567 100644
--- a/plugin/okname/find_hpcert2.php
+++ b/plugin/okname/find_hpcert2.php
@@ -115,9 +115,9 @@ $phone_no = hyphen_hp_number($req_num);
 $md5_ci = md5($ci.$ci);
 
 $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$md5_ci}'"); // ci데이터로 찾음
-if (!$row['mb_id']) { // ci로 등록된 계정이 없다면
+if (empty($row['mb_id'])) { // ci로 등록된 계정이 없다면
     $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}'"); // di데이터로 찾음
-    if(!$row['mb_id']) {
+    if(empty($row['mb_id'])) {
         alert_close("인증하신 정보로 가입된 회원정보가 없습니다.");
         exit;
     }
diff --git a/plugin/okname/find_ipin2.php b/plugin/okname/find_ipin2.php
index 3452d84bf..af767aac3 100644
--- a/plugin/okname/find_ipin2.php
+++ b/plugin/okname/find_ipin2.php
@@ -89,9 +89,9 @@ if(!empty($field[1])) { // 아이핀은 리턴받는 ci 데이터가 두가지
 $md5_ci = md5($ci.$ci);
 
 $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$md5_ci}'"); // ci데이터로 찾음
-if (!$row['mb_id']) { // ci로 등록된 계정이 없다면
+if (empty($row['mb_id'])) { // ci로 등록된 계정이 없다면
     $row = sql_fetch("select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '{$mb_dupinfo}'"); // di데이터로 찾음
-    if(!$row['mb_id']) {
+    if(empty($row['mb_id'])) {
         alert_close("인증하신 정보로 가입된 회원정보가 없습니다.");
         exit;
     }
diff --git a/plugin/okname/hpcert.config.php b/plugin/okname/hpcert.config.php
index c3db9993b..7d1db74ba 100644
--- a/plugin/okname/hpcert.config.php
+++ b/plugin/okname/hpcert.config.php
@@ -80,4 +80,5 @@ if($config['cf_cert_use'] == 2) {
 // ########################################################################
 // # 리턴 URL 설정
 // ########################################################################
+if(!empty($resultPage))
 $returnUrl = escapeshellarg(G5_OKNAME_URL.$resultPage);          // 본인인증 완료후 리턴될 URL (도메인 포함 full path);
\ No newline at end of file
diff --git a/plugin/okname/hpcert1.php b/plugin/okname/hpcert1.php
index 000dbd751..d208ab5b8 100644
--- a/plugin/okname/hpcert1.php
+++ b/plugin/okname/hpcert1.php
@@ -17,10 +17,12 @@ certify_count_check($member['mb_id'], 'hp');
 switch($_GET['pageType']){		
     case "register":
         $resultPage = "/hpcert2.php";
-    break;
+        break;
     case "find":
         $resultPage = "/find_hpcert2.php";
-    break;
+        break;
+    default:
+        alert_close('잘못된 접근입니다.');
 }
 // KISA 취약점 내용(KVE-2018-0291) hpcert1.php의 $cmd 함수에 대한 인자 값은 hpcert_config.php 파일에서 설정되나, 이를 다른 페이지에서 포함한 뒤 호출할 시 임의 값 설정 가능
 // 이에 include_once 를 require 로 수정함
diff --git a/plugin/okname/hpcert2.php b/plugin/okname/hpcert2.php
index eec69ab37..d231ea610 100644
--- a/plugin/okname/hpcert2.php
+++ b/plugin/okname/hpcert2.php
@@ -116,7 +116,7 @@ $phone_no = hyphen_hp_number($req_num);
 // 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 ($row['mb_id']) {
+if (!empty($row['mb_id'])) {
     alert_close("입력하신 본인확인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
 }
 
diff --git a/plugin/okname/ipin.config.php b/plugin/okname/ipin.config.php
index 8b03fb980..0489c11d7 100644
--- a/plugin/okname/ipin.config.php
+++ b/plugin/okname/ipin.config.php
@@ -36,6 +36,7 @@ if($config['cf_cert_use'] == 2) {
 }
 
 $idpCode   = 'V';
+if(!empty($resultPage))
 $returnUrl = G5_OKNAME_URL.$resultPage;    // 아이핀 인증을 마치고 돌아올 페이지 주소
 $keypath = G5_OKNAME_PATH.'/key/okname.key';    // 키파일이 생성될 위치. 웹서버에 해당파일을 생성할 권한 필요.
 $memid = $cpCode;   // 회원사코드
diff --git a/plugin/okname/ipin1.php b/plugin/okname/ipin1.php
index 3e4fe4f3e..17e60c5c5 100644
--- a/plugin/okname/ipin1.php
+++ b/plugin/okname/ipin1.php
@@ -17,10 +17,12 @@ certify_count_check($member['mb_id'], 'ipin');
 switch($_GET['pageType']){		
     case "register":
         $resultPage = "/ipin2.php";
-    break;
+        break;
     case "find":
         $resultPage = "/find_ipin2.php";
-    break;
+        break;
+    default:
+        alert_close('잘못된 접근입니다.');
 }
 // KISA 취약점 내용(KVE-2018-0291) hpcert1.php의 $cmd 함수에 대한 인자 값은 hpcert_config.php 파일에서 설정되나, 이를 다른 페이지에서 포함한 뒤 호출할 시 임의 값 설정 가능
 // 이에 include_once 를 require 로 수정함
diff --git a/plugin/okname/ipin2.php b/plugin/okname/ipin2.php
index bc3b52835..7f755cb5a 100644
--- a/plugin/okname/ipin2.php
+++ b/plugin/okname/ipin2.php
@@ -91,7 +91,7 @@ $mb_dupinfo = md5($ci.$ci); // 통합인증 추가 후 ci로 변경
 // 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 ($row['mb_id']) {
+if (!empty($row['mb_id'])) {
     alert_close("입력하신 본인확인 정보로 가입된 내역이 존재합니다.\\n회원아이디 : ".$row['mb_id']);
 }
 
diff --git a/plugin/social/register_member_update.php b/plugin/social/register_member_update.php
index 5c6abe013..228c52d1a 100644
--- a/plugin/social/register_member_update.php
+++ b/plugin/social/register_member_update.php
@@ -31,6 +31,7 @@ $mb_password_re = isset($_POST['mb_password_re']) ? trim($_POST['mb_password_re'
 $mb_nick        = isset($_POST['mb_nick']) ? trim(strip_tags($_POST['mb_nick'])) : '';
 $mb_email       = isset($_POST['mb_email']) ? trim($_POST['mb_email']) : '';
 $mb_name        = isset($_POST['mb_name']) ? clean_xss_tags(trim(strip_tags($_POST['mb_name']))) : '';
+$mb_hp          = isset($_POST['mb_hp']) ? trim($_POST['mb_hp']) : '';
 $mb_email       = get_email_address($mb_email);
 
 // 이름, 닉네임에 utf-8 이외의 문자가 포함됐다면 오류
@@ -106,7 +107,7 @@ if($config['cf_cert_use'] && $config['cf_cert_req']){
         // 중복체크
         $sql = " select mb_id from {$g5['member_table']} where mb_id <> '{$member['mb_id']}' and mb_dupinfo = '".get_session('ss_cert_dupinfo')."' ";
         $row = sql_fetch($sql);
-        if ($row['mb_id']) {
+        if (!empty($row['mb_id'])) {
             alert("입력하신 본인확인 정보로 가입된 내역이 존재합니다.");
         }
     }
@@ -123,8 +124,7 @@ if($config['cf_cert_use'] && $config['cf_cert_req']){
             $sql_certify .= " , mb_birth = '".get_session('ss_cert_birth')."' ";
             $sql_certify .= " , mb_sex = '".get_session('ss_cert_sex')."' ";
             $sql_certify .= " , mb_dupinfo = '".get_session('ss_cert_dupinfo')."' ";
-            if($w == 'u')
-                $sql_certify .= " , mb_name = '{$mb_name}' ";
+            $sql_certify .= " , mb_name = '{$mb_name}' ";
         } else {
             $sql_certify .= " , mb_hp = '{$mb_hp}' ";
             $sql_certify .= " , mb_certify  = '' ";
diff --git a/skin/member/basic/register_cert_reset.skin.php b/skin/member/basic/register_cert_reset.skin.php
index 6db972535..ac41cb348 100644
--- a/skin/member/basic/register_cert_reset.skin.php
+++ b/skin/member/basic/register_cert_reset.skin.php
@@ -33,7 +33,7 @@ add_stylesheet('<link rel="stylesheet" href="' . $member_skin_url . '/style.css"
                         <tbody>
                             <tr>
                                 <td>이용자 식별 및 본인여부 확인</td>
-                                <td>생년월일<?php echo ($config['mb'])? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
+                                <td>생년월일<?php echo (empty($member['mb_dupinfo']))? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
                                 <td>회원 탈퇴 시까지</td>
                             </tr>
                         </tbody>
diff --git a/skin/member/basic/register_form.skin.php b/skin/member/basic/register_form.skin.php
index 0e88ef36b..3b56e5726 100644
--- a/skin/member/basic/register_form.skin.php
+++ b/skin/member/basic/register_form.skin.php
@@ -141,7 +141,7 @@ add_stylesheet('<link rel="stylesheet" href="'.$member_skin_url.'/style.css">',
 	            <?php if ($config['cf_use_hp'] || ($config["cf_cert_use"] && ($config['cf_cert_hp'] || $config['cf_cert_sa']))) {  ?>
 	                <label for="reg_mb_hp">휴대폰번호<?php if ($config['cf_req_hp']) { ?><strong class="sound_only">필수</strong><?php } ?></label>
 	                
-	                <input type="text" name="mb_hp" value="<?php echo get_text($member['mb_hp']) ?>" id="reg_mb_hp" <?php echo ($config['cf_req_hp'])?"required":""; ?> class="frm_input full_input <?php echo ($config['cf_req_hp'])?"required":""; ?>" maxlength="20" placeholder="휴대폰번호">
+	                <input type="text" name="mb_hp" value="<?php echo get_text($member['mb_hp']) ?>" id="reg_mb_hp" <?php echo ($config['cf_req_hp'])?"required":""; ?> class="frm_input full_input <?php echo ($config['cf_req_hp'])?"required":""; ?>" <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa']) && $member['mb_certify']) { echo "readonly"; } ?> maxlength="20" placeholder="휴대폰번호">
 	                <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa'])) { ?>
 	                <input type="hidden" name="old_mb_hp" value="<?php echo get_text($member['mb_hp']) ?>">
 	                <?php } ?>
diff --git a/theme/basic/mobile/skin/member/basic/register_cert_reset.skin.php b/theme/basic/mobile/skin/member/basic/register_cert_reset.skin.php
index 7031fe379..d2d7045f1 100644
--- a/theme/basic/mobile/skin/member/basic/register_cert_reset.skin.php
+++ b/theme/basic/mobile/skin/member/basic/register_cert_reset.skin.php
@@ -37,7 +37,7 @@ add_stylesheet('<link rel="stylesheet" href="' . $member_skin_url . '/style.css"
                                 <td colspan="2">이용자 식별 및 본인여부 확인</td>
                             </tr>
                             <tr>
-                                <td>생년월일<?php echo ($config['mb'])? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
+                                <td>생년월일<?php echo (empty($member['mb_dupinfo']))? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
                                 <td>회원 탈퇴 시까지</td>
                             </tr>
                         </tbody>
diff --git a/theme/basic/mobile/skin/member/basic/register_form.skin.php b/theme/basic/mobile/skin/member/basic/register_form.skin.php
index d59723c90..c3afb973e 100644
--- a/theme/basic/mobile/skin/member/basic/register_form.skin.php
+++ b/theme/basic/mobile/skin/member/basic/register_form.skin.php
@@ -132,7 +132,7 @@ add_stylesheet('<link rel="stylesheet" href="'.$member_skin_url.'/style.css">',
 	        <li>
 	            <label for="reg_mb_hp" class="sound_only">휴대폰번호<?php if ($config['cf_req_hp']) { ?><strong>필수</strong><?php } ?></label>
 	            
-	            <input type="text" name="mb_hp" value="<?php echo get_text($member['mb_hp']) ?>" id="reg_mb_hp" <?php echo ($config['cf_req_hp'])?"required":""; ?> class="frm_input full_input <?php echo ($config['cf_req_hp'])?"required":""; ?>" maxlength="20" placeholder="휴대폰번호">
+	            <input type="text" name="mb_hp" value="<?php echo get_text($member['mb_hp']) ?>" id="reg_mb_hp" <?php echo ($config['cf_req_hp'])?"required":""; ?> class="frm_input full_input <?php echo ($config['cf_req_hp'])?"required":""; ?>" <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa']) && $member['mb_certify']) { echo "readonly"; } ?> maxlength="20" placeholder="휴대폰번호">
 	            <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa'])) { ?>
 	            <input type="hidden" name="old_mb_hp" value="<?php echo get_text($member['mb_hp']) ?>">
 	            <?php } ?>
diff --git a/theme/basic/skin/member/basic/register_cert_reset.skin.php b/theme/basic/skin/member/basic/register_cert_reset.skin.php
index 6db972535..ac41cb348 100644
--- a/theme/basic/skin/member/basic/register_cert_reset.skin.php
+++ b/theme/basic/skin/member/basic/register_cert_reset.skin.php
@@ -33,7 +33,7 @@ add_stylesheet('<link rel="stylesheet" href="' . $member_skin_url . '/style.css"
                         <tbody>
                             <tr>
                                 <td>이용자 식별 및 본인여부 확인</td>
-                                <td>생년월일<?php echo ($config['mb'])? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
+                                <td>생년월일<?php echo (empty($member['mb_dupinfo']))? ", 휴대폰 번호(아이핀 제외)" : ""; ?>, 암호화된 개인식별부호(CI)</td>
                                 <td>회원 탈퇴 시까지</td>
                             </tr>
                         </tbody>
diff --git a/theme/basic/skin/member/basic/register_form.skin.php b/theme/basic/skin/member/basic/register_form.skin.php
index 0e88ef36b..3b56e5726 100644
--- a/theme/basic/skin/member/basic/register_form.skin.php
+++ b/theme/basic/skin/member/basic/register_form.skin.php
@@ -141,7 +141,7 @@ add_stylesheet('<link rel="stylesheet" href="'.$member_skin_url.'/style.css">',
 	            <?php if ($config['cf_use_hp'] || ($config["cf_cert_use"] && ($config['cf_cert_hp'] || $config['cf_cert_sa']))) {  ?>
 	                <label for="reg_mb_hp">휴대폰번호<?php if ($config['cf_req_hp']) { ?><strong class="sound_only">필수</strong><?php } ?></label>
 	                
-	                <input type="text" name="mb_hp" value="<?php echo get_text($member['mb_hp']) ?>" id="reg_mb_hp" <?php echo ($config['cf_req_hp'])?"required":""; ?> class="frm_input full_input <?php echo ($config['cf_req_hp'])?"required":""; ?>" maxlength="20" placeholder="휴대폰번호">
+	                <input type="text" name="mb_hp" value="<?php echo get_text($member['mb_hp']) ?>" id="reg_mb_hp" <?php echo ($config['cf_req_hp'])?"required":""; ?> class="frm_input full_input <?php echo ($config['cf_req_hp'])?"required":""; ?>" <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa']) && $member['mb_certify']) { echo "readonly"; } ?> maxlength="20" placeholder="휴대폰번호">
 	                <?php if ($config['cf_cert_use'] && ($config['cf_cert_hp'] || $config['cf_cert_sa'])) { ?>
 	                <input type="hidden" name="old_mb_hp" value="<?php echo get_text($member['mb_hp']) ?>">
 	                <?php } ?>