diff --git a/AvocadoEdition_Light/plugin/kcaptcha/_common.php b/AvocadoEdition_Light/plugin/kcaptcha/_common.php
index bad54a5..03b90f3 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/_common.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/_common.php
@@ -1,3 +1,2 @@
-<?php
-include_once('../../common.php');
-?>
\ No newline at end of file
+<?php
+include_once('../../common.php');
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/captcha.lib.php b/AvocadoEdition_Light/plugin/kcaptcha/captcha.lib.php
index ea2179e..bcb7a92 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/captcha.lib.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/captcha.lib.php
@@ -1,3 +1,2 @@
-<?php
-require(dirname(__FILE__).'/kcaptcha.lib.php');
-?>
\ No newline at end of file
+<?php
+require(dirname(__FILE__).'/kcaptcha.lib.php');
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.js b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.js
index 536dccd..8d1c2b2 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.js
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.js
@@ -1,107 +1,107 @@
-$(function(){
-    var mp3_url = "";
-
-    $(document).on( "click", "#captcha_reload", function(){
-        $.ajax({
-            type: 'POST',
-            url: g5_captcha_url+'/kcaptcha_session.php',
-            cache: false,
-            async: false,
-            success: function(text) {
-                $('#captcha_img').attr('src', g5_captcha_url+'/kcaptcha_image.php?t=' + (new Date).getTime());
-            }
-        });
-
-        $.ajax({
-            type: 'POST',
-            url: g5_captcha_url+'/kcaptcha_mp3.php',
-            cache: false,
-            async: false,
-            success: function(url) {
-                if (url) {
-                    mp3_url = url + "?t="+new Date().getTime();
-                    $("#captcha_audio").attr("src", mp3_url);
-                }
-            }
-        });
-    });
-
-    $(document).on( "click", "#captcha_mp3", function(){
-        $("body").css("cursor", "wait");
-
-        $.ajax({
-            type: 'POST',
-            url: g5_captcha_url+'/kcaptcha_mp3.php',
-            cache: false,
-            async: false,
-            success: function(url) {
-                if (url) {
-                    mp3_url = url + "?t="+new Date().getTime();
-                }
-            }
-        });
-
-        var html5use = false;
-        var html5audio = document.createElement("audio");
-        if (html5audio.canPlayType && html5audio.canPlayType("audio/mpeg")) {
-            var wav = new Audio(mp3_url);
-            wav.id = "mp3_audio";
-            wav.autoplay = true;
-            wav.controls = false;
-            wav.autobuffer = false;
-            wav.loop = false;
-
-            if ($("#mp3_audio").length) $("#mp3_audio").remove();
-            $("#captcha_mp3").after(wav);
-
-            html5use = true;
-        }
-
-        if (!html5use) {
-            var object = '<object id="mp3_object" classid="clsid:22d6f312-b0f6-11d0-94ab-0080c74c7e95" height="0" width="0" style="width:0; height:0;">';
-            object += '<param name="AutoStart" value="1" />';
-            object += '<param name="Volume" value="0" />';
-            object += '<param name="PlayCount" value="1" />';
-            object += '<param name="FileName" value="' + mp3_url + '" />';
-            object += '<embed id="mp3_embed" src="' + mp3_url + '" autoplay="true" hidden="true" volume="100" type="audio/x-wav" style="display:inline;" />';
-            object += '</object>';
-            if ($("#mp3_object").length)
-                $("#mp3_object").remove();
-            $("#captcha_mp3").after(object);
-        }
-
-        $("body").css("cursor", "default");
-        return false;
-
-    }).css('cursor', 'pointer');
-
-    $("#captcha_reload").trigger("click");
-});
-
-// 출력된 캡챠이미지의 키값과 입력한 키값이 같은지 비교한다.
-function chk_captcha()
-{
-    var captcha_result = false;
-    var captcha_key = document.getElementById('captcha_key');
-    $.ajax({
-        type: 'POST',
-        url: g5_captcha_url+'/kcaptcha_result.php',
-        data: {
-            'captcha_key': captcha_key.value
-        },
-        cache: false,
-        async: false,
-        success: function(text) {
-            captcha_result = text;
-        }
-    });
-
-    if (!captcha_result) {
-        alert('자동등록방지 입력 글자가 틀렸거나 입력 횟수가 넘었습니다.\n\n새로고침을 클릭하여 다시 입력해 주십시오.');
-        captcha_key.select();
-        captcha_key.focus();
-        return false;
-    }
-
-    return true;
+$(function(){
+    var mp3_url = "";
+
+    $(document).on( "click", "#captcha_reload", function(){
+        $.ajax({
+            type: 'POST',
+            url: g5_captcha_url+'/kcaptcha_session.php',
+            cache: false,
+            async: false,
+            success: function(text) {
+                $('#captcha_img').attr('src', g5_captcha_url+'/kcaptcha_image.php?t=' + (new Date).getTime());
+            }
+        });
+
+        $.ajax({
+            type: 'POST',
+            url: g5_captcha_url+'/kcaptcha_mp3.php',
+            cache: false,
+            async: false,
+            success: function(url) {
+                if (url) {
+                    mp3_url = url + "?t="+new Date().getTime();
+                    $("#captcha_audio").attr("src", mp3_url);
+                }
+            }
+        });
+    });
+
+    $(document).on( "click", "#captcha_mp3", function(){
+        $("body").css("cursor", "wait");
+
+        $.ajax({
+            type: 'POST',
+            url: g5_captcha_url+'/kcaptcha_mp3.php',
+            cache: false,
+            async: false,
+            success: function(url) {
+                if (url) {
+                    mp3_url = url + "?t="+new Date().getTime();
+                }
+            }
+        });
+
+        var html5use = false;
+        var html5audio = document.createElement("audio");
+        if (html5audio.canPlayType && html5audio.canPlayType("audio/mpeg")) {
+            var wav = new Audio(mp3_url);
+            wav.id = "mp3_audio";
+            wav.autoplay = true;
+            wav.controls = false;
+            wav.autobuffer = false;
+            wav.loop = false;
+
+            if ($("#mp3_audio").length) $("#mp3_audio").remove();
+            $("#captcha_mp3").after(wav);
+
+            html5use = true;
+        }
+
+        if (!html5use) {
+            var object = '<object id="mp3_object" classid="clsid:22d6f312-b0f6-11d0-94ab-0080c74c7e95" height="0" width="0" style="width:0; height:0;">';
+            object += '<param name="AutoStart" value="1" />';
+            object += '<param name="Volume" value="0" />';
+            object += '<param name="PlayCount" value="1" />';
+            object += '<param name="FileName" value="' + mp3_url + '" />';
+            object += '<embed id="mp3_embed" src="' + mp3_url + '" autoplay="true" hidden="true" volume="100" type="audio/x-wav" style="display:inline;" />';
+            object += '</object>';
+            if ($("#mp3_object").length)
+                $("#mp3_object").remove();
+            $("#captcha_mp3").after(object);
+        }
+
+        $("body").css("cursor", "default");
+        return false;
+
+    }).css('cursor', 'pointer');
+
+    $("#captcha_reload").trigger("click");
+});
+
+// 출력된 캡챠이미지의 키값과 입력한 키값이 같은지 비교한다.
+function chk_captcha()
+{
+    var captcha_result = false;
+    var captcha_key = document.getElementById('captcha_key');
+    $.ajax({
+        type: 'POST',
+        url: g5_captcha_url+'/kcaptcha_result.php',
+        data: {
+            'captcha_key': captcha_key.value
+        },
+        cache: false,
+        async: false,
+        success: function(text) {
+            captcha_result = text;
+        }
+    });
+
+    if (!captcha_result) {
+        alert('자동등록방지 입력 글자가 틀렸거나 입력 횟수가 넘었습니다.\n\n새로고침을 클릭하여 다시 입력해 주십시오.');
+        captcha_key.select();
+        captcha_key.focus();
+        return false;
+    }
+
+    return true;
 }
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.lib.php b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.lib.php
index 8d345d9..9270701 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.lib.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha.lib.php
@@ -18,6 +18,8 @@
 
 class KCAPTCHA{
 
+    private $keystring;
+
 	// generates keystring and image
 	function image(){
         require(dirname(__FILE__).'/kcaptcha_config.php');
@@ -50,13 +52,13 @@ class KCAPTCHA{
             $transparent = (imagecolorat($font, $i, 0) >> 24) == 127;
 
             if(!$reading_symbol && !$transparent){
-                $font_metrics[$alphabet{$symbol}]=array('start'=>$i);
+                $font_metrics[$alphabet[$symbol]]=array('start'=>$i);
                 $reading_symbol=true;
                 continue;
             }
 
             if($reading_symbol && $transparent){
-                $font_metrics[$alphabet{$symbol}]['end']=$i;
+                $font_metrics[$alphabet[$symbol]]['end']=$i;
                 $reading_symbol=false;
                 $symbol++;
                 continue;
@@ -75,7 +77,9 @@ class KCAPTCHA{
         $odd=mt_rand(0,1);
         if($odd==0) $odd=-1;
         for($i=0;$i<$length;$i++){
-            $m=$font_metrics[$this->keystring{$i}];
+
+            if( ! isset($this->keystring[$i]) ) continue;
+            $m=$font_metrics[$this->keystring[$i]];
 
             $y=(($i%2)*$fluctuation_amplitude - $fluctuation_amplitude/2)*$odd
                 + mt_rand(-round($fluctuation_amplitude/3), round($fluctuation_amplitude/3))
@@ -169,10 +173,10 @@ class KCAPTCHA{
 				if($sx<0 || $sy<0 || $sx>=$width-1 || $sy>=$height-1){
 					continue;
 				}else{
-					$color=imagecolorat($img, $sx, $sy) & 0xFF;
-					$color_x=imagecolorat($img, $sx+1, $sy) & 0xFF;
-					$color_y=imagecolorat($img, $sx, $sy+1) & 0xFF;
-					$color_xy=imagecolorat($img, $sx+1, $sy+1) & 0xFF;
+					$color=imagecolorat($img, (int)$sx, (int)$sy) & 0xFF;
+					$color_x=imagecolorat($img, (int)$sx+1, (int)$sy) & 0xFF;
+					$color_y=imagecolorat($img, (int)$sx, (int)$sy+1) & 0xFF;
+					$color_xy=imagecolorat($img, (int)$sx+1, (int)$sy+1) & 0xFF;
 				}
 
 				if($color==255 && $color_x==255 && $color_y==255 && $color_xy==255){
@@ -202,7 +206,7 @@ class KCAPTCHA{
 					$newblue=$newcolor0*$foreground_color[2]+$newcolor*$background_color[2];
 				}
 
-				imagesetpixel($img2, $x, $y, imagecolorallocate($img2, $newred, $newgreen, $newblue));
+				imagesetpixel($img2, (int)$x, (int)$y, imagecolorallocate($img2, (int)$newred, (int)$newgreen, (int)$newblue));
 			}
 		}
 
@@ -240,17 +244,17 @@ function captcha_html($class="captcha")
     if(is_mobile())
         $class .= ' m_captcha';
 
-    $html .= "\n".'<script>var g5_captcha_url  = "'.G5_CAPTCHA_URL.'";</script>';
+    $html = "\n".'<script>var g5_captcha_url  = "'.G5_CAPTCHA_URL.'";</script>';
     //$html .= "\n".'<script>var g5_captcha_path = "'.G5_CAPTCHA_PATH.'";</script>';
     $html .= "\n".'<script src="'.G5_CAPTCHA_URL.'/kcaptcha.js"></script>';
     $html .= "\n".'<fieldset id="captcha" class="'.$class.'">';
     $html .= "\n".'<legend><label for="captcha_key">자동등록방지</label></legend>';
-    if (is_mobile()) $html .= '<audio src="#" id="captcha_audio" controls></audio>';
+    if (is_mobile()) $html .= '<audio id="captcha_audio" controls></audio>';
     //$html .= "\n".'<img src="#" alt="" id="captcha_img">';
-    $html .= "\n".'<img src="javascript:void(0);" alt="" id="captcha_img">';
+    $html .= "\n".'<img src="'.G5_CAPTCHA_URL.'/img/dot.gif" alt="" id="captcha_img">';
+    $html .= '<input type="text" name="captcha_key" id="captcha_key" required class="captcha_box required" size="6" maxlength="6">';
     if (!is_mobile()) $html .= "\n".'<button type="button" id="captcha_mp3"><span></span>숫자음성듣기</button>';
     $html .= "\n".'<button type="button" id="captcha_reload"><span></span>새로고침</button>';
-    $html .= '<input type="text" name="captcha_key" id="captcha_key" required class="captcha_box required" size="6" maxlength="6">';
     $html .= "\n".'<span id="captcha_info">자동등록방지 숫자를 순서대로 입력하세요.</span>';
     $html .= "\n".'</fieldset>';
     return $html;
@@ -260,26 +264,29 @@ function captcha_html($class="captcha")
 // 캡챠 사용시 자바스크립트에서 입력된 캡챠를 검사함
 function chk_captcha_js()
 {
-//    return "if (!chk_captcha()) return false;\n";
-	
+    return "if (!chk_captcha()) return false;\n";
 }
 
 
 // 세션에 저장된 캡챠값과 $_POST 로 넘어온 캡챠값을 비교
 function chk_captcha()
 {
-    /*$captcha_count = (int)get_session('ss_captcha_count');
+    $captcha_count = (int)get_session('ss_captcha_count');
     if ($captcha_count > 5) {
         return false;
     }
 
-    if (!isset($_POST['captcha_key'])) return false;
-    if (!trim($_POST['captcha_key'])) return false;
-    if ($_POST['captcha_key'] != get_session('ss_captcha_key')) {
+    $post_captcha_key = (isset($_POST['captcha_key']) && $_POST['captcha_key']) ? trim($_POST['captcha_key']) : '';
+    if (!trim($post_captcha_key)) return false;
+
+    if( $post_captcha_key && function_exists('get_string_encrypt') ){
+        $ip = md5(sha1($_SERVER['REMOTE_ADDR']));
+        $post_captcha_key = get_string_encrypt($ip.$post_captcha_key);
+    }
+
+    if ($post_captcha_key != get_session('ss_captcha_key')) {
         $_SESSION['ss_captcha_count'] = $captcha_count + 1;
         return false;
     }
-    return true;*/
-	return true;
-}
-?>
\ No newline at end of file
+    return true;
+}
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_config.php b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_config.php
index 90354d0..eaae544 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_config.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_config.php
@@ -1,52 +1,51 @@
-<?php
-
-# KCAPTCHA configuration file
-
-$alphabet = "0123456789abcdefghijklmnopqrstuvwxyz"; # do not change without changing font files!
-
-# symbols used to draw CAPTCHA
-$allowed_symbols = "0123456789"; #digits
-//$allowed_symbols = "0123456789abcdef"; #digits // 스캔 방지를 위하여 abcdef 추가 151029 15:00
-//$allowed_symbols = "abcdeghkmnpqsuvxyz"; #digits
-//$allowed_symbols = "23456789abcdeghkmnpqsuvxyz"; #alphabet without similar symbols (o=0, 1=l, i=j, t=f)
-
-# folder with fonts
-$fontsdir = 'fonts';
-
-# CAPTCHA string length
-//$length = mt_rand(5,6); # random 5 or 6
-$length = 6;
-
-# CAPTCHA image size (you do not need to change it, whis parameters is optimal)
-$width = 160;
-$height = 60;
-
-# symbol's vertical fluctuation amplitude divided by 2
-//$fluctuation_amplitude = 5;
-//$fluctuation_amplitude = 11; // 파동&진폭 151028 14:00
-$fluctuation_amplitude = 5; // 파동&진폭 원래대로 151029 15:00
-
-#noise
-//$white_noise_density=0; // no white noise
-$white_noise_density=1/6;
-//$black_noise_density=0; // no black noise
-$black_noise_density=1/20;
-
-# increase safety by prevention of spaces between symbols
-$no_spaces = false;
-
-# show credits
-$show_credits = false; # set to false to remove credits line. Credits adds 12 pixels to image height
-$credits = 'www.captcha.ru'; # if empty, HTTP_HOST will be shown
-
-# CAPTCHA image colors (RGB, 0-255)
-$foreground_color = array(0, 0, 0);
-$background_color = array(255, 255, 255);
-//$foreground_color = array(mt_rand(0,100), mt_rand(0,100), mt_rand(0,100));
-//$background_color = array(mt_rand(200,255), mt_rand(200,255), mt_rand(200,255));
-
-# JPEG quality of CAPTCHA image (bigger is better quality, but larger file size)
-$jpeg_quality = 90;
-
-$wave = true;
-?>
\ No newline at end of file
+<?php
+
+# KCAPTCHA configuration file
+
+$alphabet = "0123456789abcdefghijklmnopqrstuvwxyz"; # do not change without changing font files!
+
+# symbols used to draw CAPTCHA
+$allowed_symbols = "0123456789"; #digits
+//$allowed_symbols = "0123456789abcdef"; #digits // 스캔 방지를 위하여 abcdef 추가 151029 15:00
+//$allowed_symbols = "abcdeghkmnpqsuvxyz"; #digits
+//$allowed_symbols = "23456789abcdeghkmnpqsuvxyz"; #alphabet without similar symbols (o=0, 1=l, i=j, t=f)
+
+# folder with fonts
+$fontsdir = 'fonts';
+
+# CAPTCHA string length
+//$length = mt_rand(5,6); # random 5 or 6
+$length = 6;
+
+# CAPTCHA image size (you do not need to change it, whis parameters is optimal)
+$width = 160;
+$height = 60;
+
+# symbol's vertical fluctuation amplitude divided by 2
+//$fluctuation_amplitude = 5;
+//$fluctuation_amplitude = 11; // 파동&진폭 151028 14:00
+$fluctuation_amplitude = 5; // 파동&진폭 원래대로 151029 15:00
+
+#noise
+//$white_noise_density=0; // no white noise
+$white_noise_density=1/6;
+//$black_noise_density=0; // no black noise
+$black_noise_density=1/20;
+
+# increase safety by prevention of spaces between symbols
+$no_spaces = false;
+
+# show credits
+$show_credits = false; # set to false to remove credits line. Credits adds 12 pixels to image height
+$credits = 'www.captcha.ru'; # if empty, HTTP_HOST will be shown
+
+# CAPTCHA image colors (RGB, 0-255)
+$foreground_color = array(0, 0, 0);
+$background_color = array(255, 255, 255);
+//$foreground_color = array(mt_rand(0,100), mt_rand(0,100), mt_rand(0,100));
+//$background_color = array(mt_rand(200,255), mt_rand(200,255), mt_rand(200,255));
+
+# JPEG quality of CAPTCHA image (bigger is better quality, but larger file size)
+$jpeg_quality = 90;
+
+$wave = true;
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_image.php b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_image.php
index 80de84c..0fa408f 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_image.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_image.php
@@ -1,9 +1,16 @@
-<?php
-include_once("_common.php");
-include_once('captcha.lib.php');
-
-$captcha = new KCAPTCHA();
-$captcha->setKeyString(get_session("ss_captcha_key"));
-$captcha->getKeyString();
-$captcha->image();
-?>
\ No newline at end of file
+<?php
+include_once("_common.php");
+include_once('captcha.lib.php');
+
+$captcha = new KCAPTCHA();
+$ss_captcha_key = get_session("ss_captcha_key");
+$ss_captcha_key_decrypt = '';
+if( $ss_captcha_key && !preg_match('/^[0-9]/', $ss_captcha_key) && function_exists('get_string_decrypt') ){
+    $ip = md5(sha1($_SERVER['REMOTE_ADDR']));
+    $ss_captcha_key_decrypt = str_replace($ip, '', get_string_decrypt($ss_captcha_key));
+}
+# php 5.2 또는 5.3 버전에서 포인터처럼 해당 세션값이 변경되는 버그가 있어서 아래와 같이 조치함
+if(! $ss_captcha_key_decrypt) $ss_captcha_key_decrypt = $ss_captcha_key;
+$captcha->setKeyString($ss_captcha_key_decrypt);
+$captcha->getKeyString();
+$captcha->image();
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_mp3.php b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_mp3.php
index 10cae73..30961de 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_mp3.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_mp3.php
@@ -1,44 +1,49 @@
-<?php
-include_once("_common.php");
-
-function make_mp3()
-{
-    global $config;
-
-    $number = get_session("ss_captcha_key");
-
-    if ($number == "") return;
-    if ($number == get_session("ss_captcha_save")) return;
-
-    $mp3s = array();
-    for($i=0;$i<strlen($number);$i++){
-        $file = G5_CAPTCHA_PATH.'/mp3/'.$config['cf_captcha_mp3'].'/'.$number[$i].'.mp3';
-        $mp3s[] = $file;
-    }
-
-    $ip = sprintf("%u", ip2long($_SERVER['REMOTE_ADDR']));
-    $mp3_file = 'data/cache/kcaptcha-'.$ip.'_'.G5_SERVER_TIME.'.mp3';
-
-    $contents = '';
-    foreach ($mp3s as $mp3) {
-        $contents .= file_get_contents($mp3);
-    }
-
-    file_put_contents(G5_PATH.'/'.$mp3_file, $contents);
-
-    // 지난 캡챠 파일 삭제
-    if (rand(0,99) == 0) {
-        foreach (glob(G5_PATH.'/data/cache/kcaptcha-*.mp3') as $file) {
-            if (filemtime($file) + 86400 < G5_SERVER_TIME) {
-                @unlink($file);
-            }
-        }
-    }
-
-    set_session("ss_captcha_save", $number);
-
-    return G5_URL.'/'.$mp3_file;
-}
-
-echo make_mp3();
-?>
\ No newline at end of file
+<?php
+include_once("_common.php");
+
+function make_mp3()
+{
+    global $config;
+
+    $number = get_session("ss_captcha_key");
+
+    if ($number == "") return;
+    $ip = md5(sha1($_SERVER['REMOTE_ADDR']));
+    if( $number && function_exists('get_string_decrypt') ){
+        $number = str_replace($ip, '', get_string_decrypt($number));
+    }
+    if ($number == get_session("ss_captcha_save")) return;
+
+    $mp3s = array();
+    for($i=0;$i<strlen($number);$i++){
+        $file = G5_CAPTCHA_PATH.'/mp3/'.$config['cf_captcha_mp3'].'/'.$number[$i].'.mp3';
+        $mp3s[] = $file;
+    }
+
+    $mp3_file = 'cache/kcaptcha-'.$ip.'_'.G5_SERVER_TIME.'.mp3';
+
+    $contents = '';
+    foreach ($mp3s as $mp3) {
+        $contents .= file_get_contents($mp3);
+    }
+
+    file_put_contents(G5_DATA_PATH.'/'.$mp3_file, $contents);
+
+    // 지난 캡챠 파일 삭제
+    if (rand(0,99) == 0) {
+        foreach (glob(G5_DATA_PATH.'/cache/kcaptcha-*.mp3') as $file) {
+            if (filemtime($file) + 86400 < G5_SERVER_TIME) {
+                @unlink($file);
+            }
+        }
+    }
+
+    if( $number && function_exists('get_string_encrypt') ){
+        $number = get_string_encrypt($ip.$number);
+    }
+    set_session("ss_captcha_save", $number);
+
+    return G5_DATA_URL.'/'.$mp3_file;
+}
+
+echo make_mp3();
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_result.php b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_result.php
index 3975afe..fe2f1fd 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_result.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_result.php
@@ -1,13 +1,18 @@
-<?
-// 캡챠 세션값과 비교하여 맞는지? 틀린지? 결과값을 출력합니다.
-include_once("_common.php");
-//header("Content-Type: text/html; charset=$g4[charset]");
-
-$count = (int)get_session("ss_captcha_count");
-if ($count >= 5) { // 설정값 이상이면 자동등록방지 입력 문자가 맞아도 오류 처리
-    echo false;
-} else {
-    set_session("ss_captcha_count", $count + 1);
-    echo (get_session("ss_captcha_key") == $_POST['captcha_key']) ? true : false;
-}
-?>
\ No newline at end of file
+<?php
+// 캡챠 세션값과 비교하여 맞는지? 틀린지? 결과값을 출력합니다.
+include_once("_common.php");
+
+$captcha_key = isset($_POST['captcha_key']) ? $_POST['captcha_key'] : '';
+
+$count = (int)get_session("ss_captcha_count");
+if ($count >= 5) { // 설정값 이상이면 자동등록방지 입력 문자가 맞아도 오류 처리
+    echo false;
+} else {
+    set_session("ss_captcha_count", $count + 1);
+
+    if( $captcha_key && function_exists('get_string_encrypt') ){
+        $ip = md5(sha1($_SERVER['REMOTE_ADDR']));
+        $captcha_key = get_string_encrypt($ip.$captcha_key);
+    }
+    echo (get_session("ss_captcha_key") === $captcha_key) ? true : false;
+}
\ No newline at end of file
diff --git a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_session.php b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_session.php
index 657f088..c9b527d 100644
--- a/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_session.php
+++ b/AvocadoEdition_Light/plugin/kcaptcha/kcaptcha_session.php
@@ -1,18 +1,22 @@
-<?php
-include_once("_common.php");
-include_once(dirname(__FILE__).'/kcaptcha_config.php');
-include_once('captcha.lib.php');
-
-while(true){
-    $keystring='';
-    for($i=0;$i<$length;$i++){
-        $keystring.=$allowed_symbols{mt_rand(0,strlen($allowed_symbols)-1)};
-    }
-    if(!preg_match('/cp|cb|ck|c6|c9|rn|rm|mm|co|do|cl|db|qp|qb|dp|ww/', $keystring)) break;
-}
-
-set_session("ss_captcha_count", 0);
-set_session("ss_captcha_key", $keystring);
-$captcha = new KCAPTCHA();
-$captcha->setKeyString(get_session("ss_captcha_key"));
-?>
\ No newline at end of file
+<?php
+include_once("_common.php");
+include_once(dirname(__FILE__).'/kcaptcha_config.php');
+include_once('captcha.lib.php');
+
+while(true){
+    $keystring='';
+    for($i=0;$i<$length;$i++){
+        $keystring.=$allowed_symbols[mt_rand(0,strlen($allowed_symbols)-1)];
+    }
+    if(!preg_match('/cp|cb|ck|c6|c9|rn|rm|mm|co|do|cl|db|qp|qb|dp|ww/', $keystring)) break;
+}
+
+if( $keystring && function_exists('get_string_encrypt') ){
+    $ip = md5(sha1($_SERVER['REMOTE_ADDR']));
+    $keystring = get_string_encrypt($ip.$keystring);
+}
+
+set_session("ss_captcha_count", 0);
+set_session("ss_captcha_key", $keystring);
+$captcha = new KCAPTCHA();
+$captcha->setKeyString(get_session("ss_captcha_key"));
\ No newline at end of file