diff --git a/example/config.json b/example/config.json
index b9e6aa3..1bf9d37 100644
--- a/example/config.json
+++ b/example/config.json
@@ -19,6 +19,29 @@
             "size":3072,
             "line":1024
         },
+        "session":
+        {
+            "captcha":
+            {
+                "length":3,
+                "chars":"1234567890",
+                "dimensions":
+                {
+                    "width":100,
+                    "height":40
+                },
+                "background":
+                {
+                    "r":0,
+                    "g":0,
+                    "b":0
+                },
+                "ascii":
+                {
+                    "width": 50
+                }
+            }
+        },
         "action":
         {
             "welcome":
@@ -72,27 +95,6 @@
                     "template":"[{time}] handler {host}:{port} captcha: {code} sent: {sent} length: {size} bytes {data}"
                 }
             }
-        },
-        "captcha":
-        {
-            "enabled":true,
-            "length":3,
-            "chars":"1234567890",
-            "dimensions":
-            {
-                "width":100,
-                "height":40
-            },
-            "background":
-            {
-                "r":0,
-                "g":0,
-                "b":0
-            },
-            "ascii":
-            {
-                "width": 50
-            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/server.php b/src/server.php
index d96b719..4297b0a 100644
--- a/src/server.php
+++ b/src/server.php
@@ -15,8 +15,8 @@ $config = json_decode(
     )
 );
 
-// Init session code
-$code = null;
+// Init session
+$session = [];
 
 // Init server
 $server = new \Yggverse\Nps\Server(
@@ -33,47 +33,43 @@ $server->setWelcome(
     ): ?string
     {
         global $config;
-        global $code;
-
-        // Build captcha on enabled
-        if ($config->nps->captcha->enabled)
-        {
-            $captcha = new \Gregwar\Captcha\CaptchaBuilder(
-                null,
-                new \Gregwar\Captcha\PhraseBuilder(
-                    $config->nps->captcha->length,
-                    $config->nps->captcha->chars
-                )
-            );
-
-            $captcha->setBackgroundColor(
-                $config->nps->captcha->background->r,
-                $config->nps->captcha->background->g,
-                $config->nps->captcha->background->b
-            );
-
-            $captcha->build(
-                $config->nps->captcha->dimensions->width,
-                $config->nps->captcha->dimensions->height
-            );
+        global $session;
+
+        // Init session
+        $session[$connect] =
+        [
+            'time' => time(),
+            'code' => null
+        ];
+
+        // Build captcha
+        $captcha = new \Gregwar\Captcha\CaptchaBuilder(
+            null,
+            new \Gregwar\Captcha\PhraseBuilder(
+                $config->nps->session->captcha->length,
+                $config->nps->session->captcha->chars
+            )
+        );
 
-            // Set captcha value to the session code
-            $code = $captcha->getPhrase();
+        $captcha->setBackgroundColor(
+            $config->nps->session->captcha->background->r,
+            $config->nps->session->captcha->background->g,
+            $config->nps->session->captcha->background->b
+        );
 
-            // Create ASCII confirmation code
-            $image = new \Ixnode\PhpCliImage\CliImage(
-                $captcha->get(),
-                $config->nps->captcha->ascii->width
-            );
+        $captcha->build(
+            $config->nps->session->captcha->dimensions->width,
+            $config->nps->session->captcha->dimensions->height
+        );
 
-            $confirmation = PHP_EOL . $image->getAsciiString() . PHP_EOL;
-        }
+        // Set captcha value to the session code
+        $session[$connect]['captcha'] = $captcha->getPhrase();
 
-        else
-        {
-            $confirmation = null;
-            $code = true;
-        }
+        // Create ASCII confirmation code
+        $image = new \Ixnode\PhpCliImage\CliImage(
+            $captcha->get(),
+            $config->nps->session->captcha->ascii->width
+        );
 
         // Debug request on enabled
         if ($config->nps->action->welcome->debug->enabled)
@@ -97,7 +93,7 @@ $server->setWelcome(
                         (string) date('c'),
                         (string) parse_url($url, PHP_URL_HOST),
                         (string) parse_url($url, PHP_URL_PORT),
-                        (string) is_null($code) ? '[off]' : $code
+                        (string) $session[$connect]['captcha']
                     ],
                     $config->nps->action->welcome->debug->template
                 ) . PHP_EOL
@@ -108,7 +104,7 @@ $server->setWelcome(
             implode(
                 PHP_EOL,
                 $config->nps->action->welcome->message
-            ) . PHP_EOL . $confirmation
+            ) . PHP_EOL . $image->getAsciiString() . PHP_EOL
         );
     }
 );
@@ -121,7 +117,7 @@ $server->setPending(
     ): ?string
     {
         global $config;
-        global $code;
+        global $session;
 
         // Filter request
         $request = trim(
@@ -152,15 +148,15 @@ $server->setPending(
                         (string) parse_url($url, PHP_URL_HOST),
                         (string) parse_url($url, PHP_URL_PORT),
                         (string) $request,
-                        (string) is_null($code) ? '[off]' : $code
+                        (string) $session[$connect]['captcha']
                     ],
                     $config->nps->action->pending->debug->template
                 ) . PHP_EOL
             );
         }
 
-        return is_null($code) || $code == $request ? implode(PHP_EOL, $config->nps->action->pending->message->success) . PHP_EOL
-                                                   : implode(PHP_EOL, $config->nps->action->pending->message->failure) . PHP_EOL;
+        return $session[$connect]['captcha'] == $request ? implode(PHP_EOL, $config->nps->action->pending->message->success) . PHP_EOL
+                                                         : implode(PHP_EOL, $config->nps->action->pending->message->failure) . PHP_EOL;
     }
 );
 
@@ -174,13 +170,18 @@ $server->setHandler(
     ): ?string
     {
         global $config;
-        global $code;
+        global $session;
 
         // Filter request
         $request = trim(
             $request
         );
 
+        // Filter content
+        $content = trim(
+            $content
+        );
+
         // @TODO save content in blockchain with kevacoin-php
 
         // Debug request on enabled
@@ -209,17 +210,17 @@ $server->setHandler(
                         (string) parse_url($url, PHP_URL_HOST),
                         (string) parse_url($url, PHP_URL_PORT),
                         (string) str_replace('%', '%%', $request),
-                        (string) is_null($code) ? '[off]' : $code,
+                        (string) $session[$connect]['captcha'],
                         (string) mb_strlen($content),
-                        (string) $content,
+                        (string) PHP_EOL . $content,
                     ],
                     $config->nps->action->handler->debug->template
                 ) . PHP_EOL
             );
         }
 
-        return is_null($code) || $code == $request ? implode(PHP_EOL, $config->nps->action->handler->message->success) . PHP_EOL
-                                                   : implode(PHP_EOL, $config->nps->action->handler->message->failure) . PHP_EOL;
+        return $session[$connect]['captcha'] == $request ? implode(PHP_EOL, $config->nps->action->handler->message->success) . PHP_EOL
+                                                         : implode(PHP_EOL, $config->nps->action->handler->message->failure) . PHP_EOL;
     }
 );