diff --git a/modules/member/lang/en.php b/modules/member/lang/en.php
index acabc9b6b..8cd43b802 100644
--- a/modules/member/lang/en.php
+++ b/modules/member/lang/en.php
@@ -51,6 +51,8 @@ $lang->group_image_mark_max_width = 'Max Width';
 $lang->group_image_mark_max_height = 'Max Height';
 $lang->signature_max_height = 'Max Signature Height';
 $lang->enable_join = 'Accept New Members';
+$lang->enable_join_only_with_url_key = 'Only with valid URL key';
+$lang->enable_join_url_key = 'URL Key';
 $lang->enable_confirm = 'Email Activation';
 $lang->enable_find_account_question = 'Account recovery using question/answer';
 $lang->enable_ssl = 'Enable SSL';
@@ -236,7 +238,7 @@ $lang->about_active = 'You have to check on active items to show on signup form.
 $lang->about_emailhost_check = 'You can limit new member\'s e-mail address providers. You can allow or prohibit some e-mail hosts (eg.: naver.com, gmail.com).<br />If the list is empty, all e-mail hosts will be allowed.';
 $lang->about_form_description = 'If you enter description in this form, it will be displayed on join form.';
 $lang->about_required = 'Check this to make it mandatory item when signing up.';
-$lang->about_enable_join = 'Please check this if you want to allow new members to sign up your site.';
+$lang->about_enable_join = 'Please check if you want to accept new members. If you require a URL key, only those who visit with the corresponding string in the URL will be able to join.';
 $lang->about_enable_confirm = 'An activation email will be sent to new members. They must click a link in the email to complete the sign up process.';
 $lang->about_enable_find_account_question = 'Check if you want to allow members to recover their accounts using a security question and answer.';
 $lang->about_enable_ssl = 'Personal information from Sign up/Modify Member Info/Sign in can be sent as SSL(https) mode if server provides SSL service.';
diff --git a/modules/member/lang/ko.php b/modules/member/lang/ko.php
index 55584b433..e52c61481 100644
--- a/modules/member/lang/ko.php
+++ b/modules/member/lang/ko.php
@@ -51,6 +51,8 @@ $lang->group_image_mark_max_width = '가로 제한 길이';
 $lang->group_image_mark_max_height = '세로 제한 길이';
 $lang->signature_max_height = '서명 높이 제한';
 $lang->enable_join = '회원 가입 허가';
+$lang->enable_join_only_with_url_key = 'URL 키가 일치하는 경우에만 허가';
+$lang->enable_join_url_key = 'URL 키';
 $lang->enable_confirm = '메일 인증 사용';
 $lang->enable_find_account_question = '질문/답변 인증 사용';
 $lang->enable_ssl = 'SSL 기능 사용';
@@ -243,7 +245,7 @@ $lang->about_active = '활성 항목에 체크를 해야 가입시 정상적으
 $lang->about_emailhost_check = '특정 도메인에 소속된 이메일 주소로만 가입할 수 있도록 하거나, 특정 도메인을 금지할 수 있습니다. (예: naver.com, gmail.com)<br />아무 것도 입력하지 않으면 이메일 주소를 제한하지 않습니다.';
 $lang->about_form_description = '설명란에 입력을 하면 가입시 표시가 됩니다.';
 $lang->about_required = '체크하면 회원가입시 필수항목으로 입력하도록 됩니다.';
-$lang->about_enable_join = '체크하면 회원가입을 할 수 있습니다.';
+$lang->about_enable_join = '회원 가입을 받을지 선택합니다. URL 키를 사용할 경우, 일치하는 문자열이 포함된 URL로 접속해야 가입할 수 있게 됩니다.';
 $lang->about_enable_confirm = '입력된 메일 주소로 인증 메일을 보내 회원 가입을 확인합니다. 가입자가 인증 메일의 링크를 클릭해야 정상적으로 로그인이 가능해집니다.';
 $lang->about_enable_find_account_question = '질문/답변을 통한 비밀번호 찾기를 허용합니다. 허용하지 않을 경우 메일을 통한 비밀번호 리셋만 허용됩니다.';
 $lang->about_enable_ssl = '서버에서 보안접속(SSL) 지원이 될 경우 회원가입, 정보수정, 로그인 등의 개인정보가 서버로 보내질 때 SSL(https)을 이용하도록 할 수 있습니다.';
diff --git a/modules/member/member.admin.controller.php b/modules/member/member.admin.controller.php
index 3761d3160..3aa42a6f4 100644
--- a/modules/member/member.admin.controller.php
+++ b/modules/member/member.admin.controller.php
@@ -223,6 +223,7 @@ class memberAdminController extends member
 	{
 		$args = Context::gets(
 			'enable_join',
+			'enable_join_key',
 			'enable_confirm',
 			'authmail_expires',
 			'authmail_expires_unit',
@@ -238,6 +239,16 @@ class memberAdminController extends member
 			'member_profile_view'
 		);
 		
+		if ($args->enable_join === 'KEY')
+		{
+			$args->enable_join = 'N';
+			$args->enable_join_key = escape(trim(utf8_normalize_spaces(rawurldecode($args->enable_join_key))));
+		}
+		else
+		{
+			$args->enable_join_key = null;
+		}
+
 		$args->authmail_expires = max(0, intval($args->authmail_expires));
 		if(!$args->authmail_expires)
 		{
diff --git a/modules/member/member.controller.php b/modules/member/member.controller.php
index 6944d12d1..5f87d7b98 100644
--- a/modules/member/member.controller.php
+++ b/modules/member/member.controller.php
@@ -625,9 +625,12 @@ class memberController extends member
 		if(!$trigger_output->toBool ()) return $trigger_output;
 		
 		// Check if an administrator allows a membership
-		if($config->enable_join !== 'Y' || !$config->signupForm)
+		if ($config->enable_join !== 'Y' || !$config->signupForm)
 		{
-			throw new Rhymix\Framework\Exceptions\FeatureDisabled('msg_signup_disabled');
+			if (empty($config->enable_join_key) || !isset($_SESSION['signup_allowed']) || !$_SESSION['signup_allowed'])
+			{
+				throw new Rhymix\Framework\Exceptions\FeatureDisabled('msg_signup_disabled');
+			}
 		}
 		
 		// Check if the user accept the license terms (only if terms exist)
diff --git a/modules/member/member.view.php b/modules/member/member.view.php
index daf6c8b0d..273ef8af1 100644
--- a/modules/member/member.view.php
+++ b/modules/member/member.view.php
@@ -211,8 +211,28 @@ class memberView extends member
 		// call a trigger (before) 
 		$trigger_output = ModuleHandler::triggerCall('member.dispMemberSignUpForm', 'before', $member_config);
 		if(!$trigger_output->toBool()) return $trigger_output;
+
 		// Error appears if the member is not allowed to join
-		if($member_config->enable_join != 'Y') throw new Rhymix\Framework\Exceptions\FeatureDisabled('msg_signup_disabled');
+		if ($member_config->enable_join !== 'Y')
+		{
+			if (!empty($member_config->enable_join_key))
+			{
+				if (strpos(escape(rawurldecode(\RX_REQUEST_URL)), $member_config->enable_join_key) !== false)
+				{
+					$_SESSION['signup_allowed'] = true;
+				}
+				else
+				{
+					$_SESSION['signup_allowed'] = false;
+					throw new Rhymix\Framework\Exceptions\FeatureDisabled('msg_signup_disabled');
+				}
+			}
+			else
+			{
+				$_SESSION['signup_allowed'] = false;
+				throw new Rhymix\Framework\Exceptions\FeatureDisabled('msg_signup_disabled');
+			}
+		}
 		
 		$formTags = getAdminView('member')->_getMemberInputTag();
 		Context::set('formTags', $formTags);
diff --git a/modules/member/tpl/default_config.html b/modules/member/tpl/default_config.html
index a561ec949..fea433922 100644
--- a/modules/member/tpl/default_config.html
+++ b/modules/member/tpl/default_config.html
@@ -9,7 +9,10 @@
 		<div class="x_control-label">{$lang->enable_join}</div>
 		<div class="x_controls">
 			<label class="x_inline" for="enable_join_yes"><input type="radio" name="enable_join" id="enable_join_yes" value="Y" checked="checked"|cond="$config->enable_join == 'Y'" /> {$lang->cmd_yes}</label>
-			<label class="x_inline" for="enable_join_no"><input type="radio" name="enable_join" id="enable_join_no" value="N" checked="checked"|cond="$config->enable_join != 'Y'" /> {$lang->cmd_no}</label>
+			<label class="x_inline" for="enable_join_no"><input type="radio" name="enable_join" id="enable_join_no" value="N" checked="checked"|cond="$config->enable_join != 'Y' && empty($config->enable_join_key)" /> {$lang->cmd_no}</label>
+			<label class="x_inline" for="enable_join_only_with_key"><input type="radio" name="enable_join" id="enable_join_only_with_key" value="KEY" checked="checked"|cond="$config->enable_join != 'Y' && !empty($config->enable_join_key)" /> {$lang->enable_join_only_with_url_key}</label>
+			<input type="text" name="enable_join_key" id="enable_join_key" value="{$config->enable_join_key ?? ''}" placeholder="{$lang->enable_join_url_key}" style="display:none"|cond="empty($config->enable_join_key)" />
+			<p class="x_help-block">{$lang->about_enable_join}</p>
 		</div>
 	</div>
 	<div class="x_control-group">
diff --git a/modules/member/tpl/js/default_config.js b/modules/member/tpl/js/default_config.js
index a98b6d0a6..4ad6c3179 100644
--- a/modules/member/tpl/js/default_config.js
+++ b/modules/member/tpl/js/default_config.js
@@ -1,4 +1,13 @@
 jQuery(function($){
+
+	$('input[name=enable_join]').on('change', function() {
+		if ($('#enable_join_only_with_key').is(':checked')) {
+			$('#enable_join_key').show();
+		} else {
+			$('#enable_join_key').hide();
+		}
+	});
+
 	$('.__sync').click(function (){
 		exec_xml(
 			'importer', // module