diff --git a/adm/config_form.php b/adm/config_form.php
index 8629cd087..016355d11 100644
--- a/adm/config_form.php
+++ b/adm/config_form.php
@@ -1466,10 +1466,14 @@ if($config['cf_cert_use']) {
 
     // kcp일 때
     if($config['cf_cert_hp'] == 'kcp') {
-        if(PHP_INT_MAX == 2147483647) // 32-bit
-            $exe = G5_KCPCERT_PATH . '/bin/ct_cli';
-        else
-            $exe = G5_KCPCERT_PATH . '/bin/ct_cli_x64';
+        if(strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
+            if(PHP_INT_MAX == 2147483647) // 32-bit
+                $exe = G5_KCPCERT_PATH . '/bin/ct_cli';
+            else
+                $exe = G5_KCPCERT_PATH . '/bin/ct_cli_x64';
+        } else {
+            $exe = G5_KCPCERT_PATH . '/bin/ct_cli_exe.exe';
+        }
 
         echo module_exec_check($exe, 'ct_cli');
     }
diff --git a/plugin/kcpcert/bin/ct_cli_exe.exe b/plugin/kcpcert/bin/ct_cli_exe.exe
new file mode 100644
index 000000000..3abbd50c0
Binary files /dev/null and b/plugin/kcpcert/bin/ct_cli_exe.exe differ
diff --git a/plugin/kcpcert/kcpcert_result.php b/plugin/kcpcert/kcpcert_result.php
index 5468267ae..49345f89c 100644
--- a/plugin/kcpcert/kcpcert_result.php
+++ b/plugin/kcpcert/kcpcert_result.php
@@ -100,11 +100,15 @@ if( $cert_enc_use == "Y" )
 
         if ( $ct_cert->check_valid_hash ( $home_dir , $dn_hash , $veri_str ) != "1" )
         {
-            // 검증 실패시 처리 영역
-            if(PHP_INT_MAX == 2147483647) // 32-bit
-                $bin_exe = '/bin/ct_cli';
-            else
-                $bin_exe = '/bin/ct_cli_x64';
+            if(strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
+                // 검증 실패시 처리 영역
+                if(PHP_INT_MAX == 2147483647) // 32-bit
+                    $bin_exe = '/bin/ct_cli';
+                else
+                    $bin_exe = '/bin/ct_cli_x64';
+            } else {
+                $bin_exe = '/bin/ct_cli_exe.exe';
+            }
 
             echo "dn_hash 변조 위험있음 (".G5_KCPCERT_PATH.$bin_exe." 파일에 실행권한이 있는지 확인하세요.)";
             exit;
@@ -133,6 +137,13 @@ if( $cert_enc_use == "Y" )
         $dec_res_cd     = $ct_cert->mf_get_key_value("res_cd"     );                // 암호화된 결과코드
         $dec_mes_msg    = $ct_cert->mf_get_key_value("res_msg"    );                // 암호화된 결과메시지
 
+        if(strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' && function_exists('mb_detect_encoding') ){
+            if( mb_detect_encoding($user_name, 'EUC-KR') === 'EUC-KR' ){
+                $user_name = iconv_utf8($user_name);
+                $dec_mes_msg = iconv_utf8($dec_mes_msg);
+            }
+        }
+
         // 정상인증인지 체크
         if(!$phone_no)
             alert_close("정상적인 인증이 아닙니다. 올바른 방법으로 이용해 주세요.");
diff --git a/plugin/kcpcert/lib/ct_cli_lib.php b/plugin/kcpcert/lib/ct_cli_lib.php
index 77c629bd3..bc29ad013 100644
--- a/plugin/kcpcert/lib/ct_cli_lib.php
+++ b/plugin/kcpcert/lib/ct_cli_lib.php
@@ -22,11 +22,14 @@ class   C_CT_CLI
     // hash 처리 영역
     function make_hash_data( $home_dir , $str )
     {
-        if(PHP_INT_MAX == 2147483647) // 32-bit
-            $bin_exe = $home_dir . '/bin/ct_cli';
-        else
-            $bin_exe = $home_dir . '/bin/ct_cli_x64';
-
+        if(strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
+            if(PHP_INT_MAX == 2147483647) // 32-bit
+                $bin_exe = $home_dir . '/bin/ct_cli';
+            else
+                $bin_exe = $home_dir . '/bin/ct_cli_x64';
+        } else {
+            $bin_exe = $home_dir . '/bin/ct_cli_exe.exe';
+        }
         $hash_data = $this -> mf_exec( $bin_exe ,
                                        "lf_CT_CLI__make_hash_data",
                                        $str
@@ -40,11 +43,14 @@ class   C_CT_CLI
     // dn_hash 체크 함수
     function check_valid_hash ($home_dir , $hash_data , $str )
     {
-        if(PHP_INT_MAX == 2147483647) // 32-bit
-            $bin_exe = $home_dir . '/bin/ct_cli';
-        else
-            $bin_exe = $home_dir . '/bin/ct_cli_x64';
-
+        if(strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
+            if(PHP_INT_MAX == 2147483647) // 32-bit
+                $bin_exe = $home_dir . '/bin/ct_cli';
+            else
+                $bin_exe = $home_dir . '/bin/ct_cli_x64';
+        } else {
+            $bin_exe = $home_dir . '/bin/ct_cli_exe.exe';
+        }
         $ret_val = $this -> mf_exec( $bin_exe ,
                                      "lf_CT_CLI__check_valid_hash" ,
                                      $hash_data ,
@@ -59,18 +65,31 @@ class   C_CT_CLI
     // 암호화 인증데이터 복호화
     function decrypt_enc_cert ( $home_dir, $site_cd , $cert_no , $enc_cert_data , $opt)
     {
-        if(PHP_INT_MAX == 2147483647) // 32-bit
-            $bin_exe = $home_dir . '/bin/ct_cli';
-        else
-            $bin_exe = $home_dir . '/bin/ct_cli_x64';
+        if(strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
+            if(PHP_INT_MAX == 2147483647) // 32-bit
+                $bin_exe = $home_dir . '/bin/ct_cli';
+            else
+                $bin_exe = $home_dir . '/bin/ct_cli_x64';
+
+            $dec_data = $this -> mf_exec( $bin_exe ,
+                                         "lf_CT_CLI__decrypt_enc_cert" ,
+                                          $site_cd ,
+                                          $cert_no ,
+                                          $enc_cert_data ,
+                                          $opt
+                                        );
+
+        } else {
+            $bin_exe = $home_dir . '/bin/ct_cli_exe.exe';
+
+            $dec_data = $this -> mf_exec( $bin_exe ,
+                                         "lf_CT_CLI__decrypt_enc_cert" ,
+                                          $site_cd ,
+                                          $cert_no ,
+                                          $enc_cert_data
+                                        );
+        }
 
-        $dec_data = $this -> mf_exec( $bin_exe ,
-                                     "lf_CT_CLI__decrypt_enc_cert" ,
-                                      $site_cd ,
-                                      $cert_no ,
-                                      $enc_cert_data ,
-                                      $opt
-                                    );
         if ( $dec_data == "" ) { $dec_data = "HS03"; }