diff --git a/tools/security/captcha.php b/tools/security/captcha.php
deleted file mode 100755
index e5cb1a5d3..000000000
--- a/tools/security/captcha.php
+++ /dev/null
@@ -1,166 +0,0 @@
-<?php
-/*
-Code original de ce fichier : Julien BALLESTRACCI
-Patch: Captcha (c) 2007 Julien Ballestracci <julien@ecole-et-nature.org>
---
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
-INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
---
-*/
-
-include_once('../../wakka.config.php');
-if (isset($wakkaConfig['captcha_words']) && is_array($wakkaConfig['captcha_words'])) {
-    $textes = $wakkaConfig['captcha_words'];
-} else {
-    $textes = array(
-        "cactus",
-        "arbre",
-        "palmier",
-        "plante",
-        "jungle",
-        "foret",
-        "feuille",
-        "eau",
-        "ocean",
-        "terre",
-        "kiwi",
-        "laitue",
-        "salade",
-        "narcisse",
-        "pommier",
-        "rose",
-        "sapin",
-        "vigne",
-        "ecorse",
-        "trefle",
-        "radis",
-        "mimosa"
-    );
-}
-
-
-class TheCaptcha
-{
-    public $image;
-    public $size;
-    public $text;
-    public $colours;
-
-    // constructeur
-    public function __construct()
-    {
-        global $textes;
-        srand((float) microtime() * 10000000);
-        $this->size = $this->getImageSize();
-
-        // Création de l'image
-        $this->image = imagecreatetruecolor($this->size, 50);
-        $this->loadColours();
-
-        $uri = $_SERVER['REQUEST_URI'];
-        $tmp = explode("?", $uri);
-        $hash = (!empty($tmp[1]) ? $tmp[1] : null);
-
-        $this->text = $this->findWord($hash);
-    }
-
-    // calcul de la taille de l'image en fonction du mot le plus long
-    public function getImageSize()
-    {
-        global $textes;
-        $theLongWord = null;
-        foreach ($textes as $text) {
-            if (strlen($text) > strlen($theLongWord)) {
-                $theLongWord = $text;
-            }
-        }
-
-        $size = ((strlen($theLongWord) * 27) + (15 * 2));
-        unset($theLongWord);
-        return $size;
-    }
-
-    // chargement des couleurs
-    public function loadColours()
-    {
-        // red
-        $this->colours = array(
-            'red'  =>  imagecolorallocate($this->image, 214, 34, 34),
-            'blue'  =>  imagecolorallocate($this->image, 34, 132, 214),
-            'green'  =>  imagecolorallocate($this->image, 68, 214, 34),
-            'yellow'  => imagecolorallocate($this->image, 234, 231, 19),
-            'turkoise'  => imagecolorallocate($this->image, 68, 211, 216),
-            'pink'  => imagecolorallocate($this->image, 216, 68, 204),
-            'orange'  => imagecolorallocate($this->image, 216, 155, 68),
-        );
-    }
-
-    // affiche le captcha
-    public function printImage()
-    {
-        // Définition du content-type
-        header("Content-type: image/png");
-
-        $grey = imagecolorallocate($this->image, 200, 196, 196);
-        $white = imagecolorallocate($this->image, 255, 255, 255);
-        $black = imagecolorallocate($this->image, 0, 0, 0);
-
-        imagefilledrectangle($this->image, 0, 0, $this->size, 50, $white);
-        $font = __DIR__ . '/agenda__.ttf';
-
-        // dessinons quelques eclipses ;)
-        for ($t = 0; $t <= 20; $t++) {
-            imageellipse($this->image, rand(0, $this->size), rand(0, 50), rand(0, 200), rand(0, 200), $grey);
-        }
-
-        // centrage du texte
-        $maxWord = (($this->size - 30) / 27);
-        $cur_left = (strlen($this->text) == $maxWord ? 15 : (15 + ((($maxWord - strlen($this->text)) * 27)) / 2));
-
-        for ($t = 0; isset($this->text[$t]); $t++) {
-            $cur_incli = rand(-20, 20);
-            // ombre
-            imagettftext($this->image, 32, $cur_incli, $cur_left, 40, $black, $font, $this->text[$t]);
-            // texte
-            imagettftext($this->image, 32, $cur_incli, ($cur_left - 1), 39, $this->colours[array_rand($this->colours)], $font, $this->text[$t]);
-            $cur_left += 27;
-        }
-
-        imagepng($this->image);
-        imagedestroy($this->image);
-    }
-
-    // trouve le bon mot par rapport au hash envoyé
-    public function findWord($hash = null)
-    {
-        global $textes;
-        if ($hash) {
-            foreach ($textes as $text) {
-                if ($hash == cryptWord($text)) {
-                    return $text;
-                }
-            }
-        }
-
-        return $textes[array_rand($textes)];
-    }
-}
-
-// retourne le cryptage pour la vérification
-function cryptWord($word)
-{
-    return md5(crypt(strtolower($word), 'ca'));
-}
-
-if (!defined('CAPTCHA_INCLUDE')) {
-    $captcha = new TheCaptcha();
-    $captcha->printImage();
-}