diff --git a/config/config.ini.example b/config/config.ini.example
index d55b50a..f657b1f 100644
--- a/config/config.ini.example
+++ b/config/config.ini.example
@@ -59,12 +59,13 @@ google.analytics.id = ""
 ; Google gtag analytics
 google.gtag.id = ""
 
-; Google reCaptcha
-; https://www.google.com/recaptcha/admin. Options "false" and "true"
+; Login protection system  Choose "google", "cloudflare", or "disable".
+; https://www.google.com/recaptcha/admin
+; https://developers.cloudflare.com/turnstile/
 
-google.reCaptcha = "false"
-google.reCaptcha.public = ""
-google.reCaptcha.private = ""
+login.protect.system = "disable"
+login.protect.public = ""
+login.protect.private = ""
 
 ; Pagination, RSS, and JSON
 posts.perpage = "10"
diff --git a/lang/en_US.ini b/lang/en_US.ini
index aaa42ad..2b91046 100644
--- a/lang/en_US.ini
+++ b/lang/en_US.ini
@@ -37,7 +37,7 @@ cache_off = "Cache off"
 cache_timestamp = "Cache timestamp"
 cancel = "Cancel"
 cannot_read_feed_content = "Cannot read feed content"
-captcha_error = "reCaptcha not correct"
+captcha_error = "Captcha failed"
 categories = "Categories"
 category = "Category"
 check_update = "Check for update"
@@ -87,7 +87,7 @@ front_page_displays = "Front page displays"
 full_post = "Full post"
 general = "General"
 general_settings = "General Settings"
-get_one_here = "Get one here"
+get_one_here = "Obtain your reCaptcha keys here: "
 github_pre_release = "Github pre-release"
 google_analytics = "Google Analytics"
 google_analytics_legacy = "Google Analytics (legacy)"
@@ -186,7 +186,7 @@ reading = "Reading"
 writing = "Writing"
 reading_settings = "Reading Settings"
 writing_settings = "Writing Settings"
-recaptcha = "reCAPTCHA"
+recaptcha = "Login Protection"
 recent_posts = "Recent posts"
 recent_posts_widget_at_most = "Recent posts widget at most"
 regular_post = "Regular post"
@@ -297,3 +297,5 @@ mfa_error = "MFA code is not correct"
 disablemfa = "Disable MFA"
 enable_auto_save = "Enable Auto Save to Drafts"
 explain_autosave = "When enabled, new posts or pages will automatically be saved as a draft every 60 seconds after you start writing."
+login_protect_system = "Login protection system"
+cloudflare_info = "Review Cloudflare's Turnstile documentation: "
\ No newline at end of file
diff --git a/system/admin/views/config-widget.html.php b/system/admin/views/config-widget.html.php
index c83f9fc..f1bf7bd 100644
--- a/system/admin/views/config-widget.html.php
+++ b/system/admin/views/config-widget.html.php
@@ -176,35 +176,42 @@
   <h4><?php echo i18n('Recaptcha');?></h4>
   <hr>
   <p><?php echo i18n('Get_one_here');?>  <a target="_blank" href="https://www.google.com/recaptcha/admin">https://www.google.com/recaptcha/admin</a>
+  <p><?php echo i18n('Cloudflare_info');?>  <a target="_blank" href="https://developers.cloudflare.com/turnstile/">https://developers.cloudflare.com/turnstile/</a>
   <div class="form-group row">
     <label class="col-sm-2 col-form-label"><?php echo i18n('Recaptcha');?></label>
     <div class="col-sm-10">
       <div class="col-sm-10">
         <div class="form-check">
-          <input class="form-check-input" type="radio" name="-config-google.reCaptcha" id="google.reCaptcha1" value="true" <?php if (config('google.reCaptcha') === 'true'):?>checked<?php endif;?>>
-          <label class="form-check-label" for="google.reCaptcha1">
-            <?php echo i18n('Enable');?>
+          <input class="form-check-input" type="radio" name="-config-login.protect.system" id="login.protect.system1" value="disable" <?php if (config('login.protect.system') === 'disable'):?>checked<?php endif;?>>
+          <label class="form-check-label" for="login.protect.system1">
+            <?php echo i18n('Disabled');?>
           </label>
         </div>
         <div class="form-check">
-          <input class="form-check-input" type="radio" name="-config-google.reCaptcha" id="google.reCaptcha2" value="false" <?php if (config('google.reCaptcha') === 'false'):?>checked<?php endif;?>>
-          <label class="form-check-label" for="google.reCaptcha2">
-            <?php echo i18n('Disable');?>
+          <input class="form-check-input" type="radio" name="-config-login.protect.system" id="login.protect.system2" value="google" <?php if (config('login.protect.system') === 'google'):?>checked<?php endif;?>>
+          <label class="form-check-label" for="login.protect.system2">
+            Google reCaptcha
+          </label>
+        </div>
+        <div class="form-check">
+          <input class="form-check-input" type="radio" name="-config-login.protect.system" id="login.protect.system3" value="cloudflare" <?php if (config('login.protect.system') === 'cloudflare'):?>checked<?php endif;?>>
+          <label class="form-check-label" for="login.protect.system3">
+            Cloudflare Turnstile
           </label>
         </div>
       </div>
     </div>
   </div>
   <div class="form-group row">
-    <label for="google.reCaptcha.public" class="col-sm-2 col-form-label"><?php echo i18n('Site_Key');?></label>
+    <label for="login.protect.public" class="col-sm-2 col-form-label"><?php echo i18n('Site_Key');?></label>
     <div class="col-sm-10">
-      <input type="text" name="-config-google.reCaptcha.public" class="form-control" id="google.reCaptcha.public" value="<?php echo valueMaker(config('google.reCaptcha.public'));?>" placeholder="<?php echo i18n('widget_key_placeholder');?>">
+      <input type="text" name="-config-login.protect.public" class="form-control" id="login.protect.public" value="<?php echo valueMaker(config('login.protect.public'));?>" placeholder="<?php echo i18n('widget_key_placeholder');?>">
     </div>
   </div>
   <div class="form-group row">
-    <label for="google.reCaptcha.private" class="col-sm-2 col-form-label"><?php echo i18n('Secret_Key');?></label>
+    <label for="login.protect.private" class="col-sm-2 col-form-label"><?php echo i18n('Secret_Key');?></label>
     <div class="col-sm-10">
-      <input type="text" name="-config-google.reCaptcha.private" class="form-control" id="google.reCaptcha.private" value="<?php echo valueMaker(config('google.reCaptcha.private'));?>" placeholder="<?php echo i18n('widget_key_placeholder');?>">
+      <input type="text" name="-config-login.protect.private" class="form-control" id="login.protect.private" value="<?php echo valueMaker(config('login.protect.private'));?>" placeholder="<?php echo i18n('widget_key_placeholder');?>">
     </div>
   </div>
   <br>
diff --git a/system/admin/views/login.html.php b/system/admin/views/login.html.php
index 8ab940d..3501edc 100644
--- a/system/admin/views/login.html.php
+++ b/system/admin/views/login.html.php
@@ -24,9 +24,14 @@
         <label><?php echo i18n('MFACode');?></label>
         <input type="text" class="form-control" name="mfacode" placeholder="<?php echo i18n('verify_code'); ?>"/>
         <br>
-        <?php if (config('google.reCaptcha') === 'true'): ?>
+        <?php if (config('login.protect.system') === 'google'): ?>
             <script src='https://www.google.com/recaptcha/api.js'></script>
-            <div class="g-recaptcha" data-sitekey="<?php echo config("google.reCaptcha.public"); ?>"></div>
+            <div class="g-recaptcha" data-sitekey="<?php echo config("login.protect.public"); ?>"></div>
+            <br/>
+        <?php endif; ?>
+        <?php if (config('login.protect.system') === 'cloudflare'): ?>
+            <script src="https://challenges.cloudflare.com/turnstile/v0/api.js" defer></script>
+			<div style="text-align:center;" class="cf-turnstile" data-sitekey="<?php echo config("login.protect.public"); ?>"></div>
             <br/>
         <?php endif; ?>
         <input type="submit" class="btn btn-primary" name="submit" value="<?php echo i18n('Login');?>"/>
diff --git a/system/configList.json b/system/configList.json
index 84f89b1..b5ea594 100644
--- a/system/configList.json
+++ b/system/configList.json
@@ -27,9 +27,9 @@
     "google.wmt.id",
     "google.analytics.id",
     "google.gtag.id",
-    "google.reCaptcha",
-    "google.reCaptcha.public",
-    "google.reCaptcha.private",
+    "login.protect.system",
+    "login.protect.public",
+    "login.protect.private",
     "posts.perpage",
     "category.perpage",
     "tag.perpage",
diff --git a/system/htmly.php b/system/htmly.php
index b4d72f8..6400388 100644
--- a/system/htmly.php
+++ b/system/htmly.php
@@ -121,7 +121,13 @@ get('/index', function () {
 post('/login', function () {
 
     $proper = (is_csrf_proper(from($_REQUEST, 'csrf_token')));
+    if (config('login.protect.system') === 'google') {
     $captcha = isCaptcha(from($_REQUEST, 'g-recaptcha-response'));
+    } elseif (config('login.protect.system') === 'cloudflare') {
+        $captcha = isTurnstile(from($_REQUEST, 'cf-turnstile-response'));
+    } else {
+        $captcha = true;
+    }
 
     $user = from($_REQUEST, 'user');
     $pass = from($_REQUEST, 'password');
diff --git a/system/includes/functions.php b/system/includes/functions.php
index aa76d08..5ab35c6 100644
--- a/system/includes/functions.php
+++ b/system/includes/functions.php
@@ -3561,12 +3561,9 @@ function remove_html_comments($content)
 // Google recaptcha
 function isCaptcha($reCaptchaResponse)
 {
-    if (config('google.reCaptcha') != 'true') {
-        return true;
-    }
     $url = "https://www.google.com/recaptcha/api/siteverify";
     $options = array(
-        "secret" => config("google.reCaptcha.private"),
+        "secret" => config("login.protect.private"),
         "response" => $reCaptchaResponse,
         "remoteip" => $_SERVER['REMOTE_ADDR'],
     );
@@ -3581,6 +3578,35 @@ function isCaptcha($reCaptchaResponse)
     return ($json['success']);
 }
 
+// Cloudflare Turnstile
+function isTurnstile($turnstileResponse)
+{
+	$public = config("login.protect.public");
+	$private = config("login.protect.private");
+    $ip = $_SERVER['REMOTE_ADDR'];
+
+    $url = 'https://challenges.cloudflare.com/turnstile/v0/siteverify';
+    $data = array('secret' => $private, 'response' => $turnstileResponse, 'remoteip' => $ip);
+
+    $options = array(
+        'http' => array(
+        'method' => 'POST',
+        'content' => http_build_query($data))
+    );
+
+    $stream = stream_context_create($options);
+    $fileContent = file_get_contents($url, false, $stream);
+ 
+    if ($fileContent === false) {
+        return false;
+    }
+    $json = json_decode($fileContent, true);
+    if ($json == false) {
+        return false;
+    }
+    return ($json['success']);
+}
+
 // Get video ID
 function get_video_id($url)
 {