diff --git a/src/BeSimple/SoapServer/WsSecurityFilter.php b/src/BeSimple/SoapServer/WsSecurityFilter.php
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+<?php
+
+/*
+ * This file is part of the BeSimpleSoapServer.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ * (c) Francis Besset <francis.besset@gmail.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace BeSimple\SoapServer;
+
+use ass\XmlSecurity\DSig as XmlSecurityDSig;
+use ass\XmlSecurity\Enc as XmlSecurityEnc;
+use ass\XmlSecurity\Key as XmlSecurityKey;
+
+use BeSimple\SoapCommon\FilterHelper;
+use BeSimple\SoapCommon\Helper;
+use BeSimple\SoapCommon\SoapRequest as CommonSoapRequest;
+use BeSimple\SoapCommon\SoapRequestFilter;
+use BeSimple\SoapCommon\SoapResponse as CommonSoapResponse;
+use BeSimple\SoapCommon\SoapResponseFilter;
+use BeSimple\SoapCommon\WsSecurityKey;
+
+/**
+ * This plugin implements a subset of the following standards:
+ *  * Web Services Security: SOAP Message Security 1.0 (WS-Security 2004)
+ *      http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0.pdf
+ *  * Web Services Security UsernameToken Profile 1.0
+ *      http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0.pdf
+ *  * Web Services Security X.509 Certificate Token Profile
+ *      http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0.pdf
+ *
+ * @author Andreas Schamberger <mail@andreass.net>
+ */
+class WsSecurityFilter implements SoapRequestFilter, SoapResponseFilter
+{
+    /*
+     * The date format to be used with {@link \DateTime}
+     */
+    const DATETIME_FORMAT = 'Y-m-d\TH:i:s.000\Z';
+
+    /**
+     * Actor.
+     *
+     * @var string
+     */
+    protected $actor;
+
+    /**
+     * (SMS 10) Add security timestamp.
+     *
+     * @var boolean
+     */
+    protected $addTimestamp;
+
+    /**
+     * (SMS 10) Security timestamp expires time in seconds.
+     *
+     * @var int
+     */
+    protected $expires;
+
+    /**
+     * Username/password callback that returns password or null.
+     *
+     * @var callable
+     */
+    protected $usernamePasswordCallback;
+
+    /**
+     * Constructor.
+     *
+     * @param boolean $addTimestamp (SMS 10) Add security timestamp.
+     * @param int     $expires      (SMS 10) Security timestamp expires time in seconds.
+     * @param string  $actor        SOAP actor
+     */
+    public function __construct($addTimestamp = true, $expires = 300, $actor = null)
+    {
+        $this->addTimestamp = $addTimestamp;
+        $this->expires      = $expires;
+        $this->actor        = $actor;
+    }
+
+    /**
+     * Set username/password callback that returns password or null.
+     *
+     * @param callable $callback Username/password callback function
+     *
+     * @return void
+     */
+    public function setUsernamePasswordCallback($callback)
+    {
+        $this->usernamePasswordCallback = $callback;
+    }
+
+    /**
+     * Reset all properties to default values.
+     */
+    public function resetFilter()
+    {
+        $this->actor                    = null;
+        $this->addTimestamp             = null;
+        $this->expires                  = null;
+        $this->usernamePasswordCallback = null;
+    }
+
+    /**
+     * Modify the given request XML.
+     *
+     * @param \BeSimple\SoapCommon\SoapRequest $request SOAP request
+     *
+     * @return void
+     */
+    public function filterRequest(CommonSoapRequest $request)
+    {
+        // get \DOMDocument from SOAP request
+        $dom = $request->getContentDocument();
+
+        // locate security header
+        $security = $dom->getElementsByTagNameNS(Helper::NS_WSS, 'Security')->item(0);
+        if (null !== $security) {
+
+            // is security header still valid?
+            $query = '//'.Helper::PFX_WSU.':Timestamp/'.Helper::PFX_WSU.':Expires';
+            $xpath = new \DOMXPath($dom);
+            $xpath->registerNamespace(Helper::PFX_WSU, Helper::NS_WSU);
+            $expires = $xpath->query($query, $security)->item(0);
+
+            if (null !== $expires) {
+                $expiresDatetime = \DateTime::createFromFormat(self::DATETIME_FORMAT, $expires->textContent, new \DateTimeZone('UTC'));
+                $currentDatetime = new \DateTime('now', new \DateTimeZone('UTC'));
+
+                if ($currentDatetime > $expiresDatetime) {
+                    throw new \SoapFault('wsu:MessageExpired', 'Security semantics are expired');
+                }
+            }
+
+            $usernameToken = $security->getElementsByTagNameNS(Helper::NS_WSS, 'UsernameToken')->item(0);
+            if (null !== $usernameToken) {
+                $usernameTokenUsername = $usernameToken->getElementsByTagNameNS(Helper::NS_WSS, 'Username')->item(0);
+                $usernameTokenPassword = $usernameToken->getElementsByTagNameNS(Helper::NS_WSS, 'Password')->item(0);
+
+                $password = call_user_func($this->usernamePasswordCallback, $usernameTokenUsername->textContent);
+
+                if ($usernameTokenPassword->getAttribute('Type') == Helper::NAME_WSS_UTP . '#PasswordDigest') {
+                    $nonce = $usernameToken->getElementsByTagNameNS(Helper::NS_WSS, 'Nonce')->item(0);
+                    $created = $usernameToken->getElementsByTagNameNS(Helper::NS_WSU, 'Created')->item(0);
+                    $password = base64_encode(sha1(base64_decode($nonce->textContent) . $created->textContent . $password, true));
+                }
+
+                if (null === $password || $usernameTokenPassword->textContent != $password) {
+                    throw new \SoapFault('wsse:FailedAuthentication', 'The security token could not be authenticated or authorized');
+                }
+            }
+
+            $security->parentNode->removeChild($security);
+        }
+    }
+
+    /**
+     * Modify the given request XML.
+     *
+     * @param \BeSimple\SoapCommon\SoapResponse $response SOAP response
+     *
+     * @return void
+     */
+    public function filterResponse(CommonSoapResponse $response)
+    {
+        // get \DOMDocument from SOAP response
+        $dom = $response->getContentDocument();
+
+    }
+
+}
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