diff --git a/index.html b/index.html
index c0e16e5..a4cae9b 100644
--- a/index.html
+++ b/index.html
@@ -34,6 +34,9 @@
                 <input type="submit" value="Set!">
                 <button onclick="data.save()" type="button">Save!</button> 
             </form>
+
+            <h2>Your fingerprint</h2>
+            <div id="fingerprint"></div>
         </div>
     </body>
 </html>
diff --git a/src/de/tudbut/tryumph/example/Main.java b/src/de/tudbut/tryumph/example/Main.java
index 20c360a..559296e 100644
--- a/src/de/tudbut/tryumph/example/Main.java
+++ b/src/de/tudbut/tryumph/example/Main.java
@@ -4,6 +4,8 @@ import java.net.Socket;
 
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
+import org.w3c.dom.Node;
+
 import de.tudbut.async.Callback;
 import de.tudbut.async.ComposeCallback;
 import de.tudbut.async.TaskCallable;
@@ -12,6 +14,7 @@ import de.tudbut.tryumph.events.EventListener;
 import de.tudbut.tryumph.events.GET;
 import de.tudbut.tryumph.events.POST;
 import de.tudbut.tryumph.events.Path;
+import de.tudbut.tryumph.server.HTMLParsing;
 import de.tudbut.tryumph.server.Request;
 import de.tudbut.tryumph.server.Response;
 import tudbut.parsing.TCN;
@@ -55,7 +58,13 @@ public class Main implements IRequestCatcher {
     @GET
     @Path("/")
     public void onIndex(Request request, Callback<Response> res, Callback<Throwable> rej) {
-        res.call(new Response(request, request.context.file("index.html"), 200, "OK"));
+        Response r = new Response(request, request.context.file("index.html"), 200, "OK");
+        System.out.println(r.getHTMLData());
+        Document html = r.getHTML();
+        Node node = html.createTextNode(request.fingerPrint());
+        HTMLParsing.getElementById(html, "fingerprint").appendChild(node);
+        r.updateHTMLData();
+        res.call(r);
     }
 
     @POST
@@ -64,7 +73,12 @@ public class Main implements IRequestCatcher {
         TCN query = request.bodyURLEncoded();
         request.context.data.set(query.getString("name"), query.getString("value"));
         request.context.save();
-        res.call(new Response(request, request.context.file("index.html"), 200, "OK"));
+        Response r = new Response(request, request.context.file("index.html"), 200, "OK");
+        Document html = r.getHTML();
+        Node node = html.createTextNode(request.fingerPrint());
+        HTMLParsing.getElementById(html, "fingerprint").appendChild(node);
+        r.updateHTMLData();
+        res.call(r);
     }
 
 }
diff --git a/src/de/tudbut/tryumph/server/HTMLParsing.java b/src/de/tudbut/tryumph/server/HTMLParsing.java
index 2e37077..430b9b8 100644
--- a/src/de/tudbut/tryumph/server/HTMLParsing.java
+++ b/src/de/tudbut/tryumph/server/HTMLParsing.java
@@ -5,7 +5,10 @@ import java.io.IOException;
 import java.io.StringReader;
 import java.io.Writer;
 
+import org.w3c.dom.Attr;
 import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
 import org.w3c.tidy.Tidy;
 
 import de.tudbut.tryumph.util.Bug;
@@ -13,6 +16,19 @@ import de.tudbut.tryumph.util.Bug;
 public class HTMLParsing {
     private static Tidy tidy = new Tidy();
 
+
+    public static Element getElementById(Document document, String id) {
+        NodeList list = document.getElementsByTagName("*");
+        for(int i = 0; i < list.getLength(); i++) {
+            Element el = (Element) list.item(i);
+            Attr attr = el.getAttributeNode("id");
+            if(attr != null && attr.getNodeValue().equals(id)) {
+                return el;
+            }
+        }
+        return null;
+    }
+
     public static Document parse(String html) {
         return (Document) tidy.parseDOM(new StringReader(html), (Writer) null);
     }
diff --git a/src/de/tudbut/tryumph/server/Request.java b/src/de/tudbut/tryumph/server/Request.java
index 6d1d39a..d77cd63 100644
--- a/src/de/tudbut/tryumph/server/Request.java
+++ b/src/de/tudbut/tryumph/server/Request.java
@@ -3,6 +3,7 @@ package de.tudbut.tryumph.server;
 import java.net.Socket;
 import java.util.HashMap;
 
+import de.tudbut.tools.Hasher;
 import de.tudbut.tryumph.util.ReadOnlyHashMap;
 import tudbut.net.http.HTTPUtils;
 import tudbut.parsing.TCN;
@@ -37,6 +38,16 @@ public class Request {
         splitPath = realPath.split("/");
     }
 
+    public String fingerPrint() {
+        StringBuilder data = new StringBuilder();
+        data.append(headers.get("User-Agent"));
+        data.append(headers.get("Accept"));
+        data.append(headers.get("Accept-Encoding"));
+        data.append(headers.get("Connection"));
+        data.append(headers.get("Accept-Language"));
+        return Hasher.sha512hex(data.toString());
+    }
+
     @Override
     public String toString() {
         return  method + " " + path + " " + httpVersion + "\n" +
diff --git a/src/de/tudbut/tryumph/server/http/HTTPRequestReader.java b/src/de/tudbut/tryumph/server/http/HTTPRequestReader.java
index 67d77fa..dc029c5 100644
--- a/src/de/tudbut/tryumph/server/http/HTTPRequestReader.java
+++ b/src/de/tudbut/tryumph/server/http/HTTPRequestReader.java
@@ -57,7 +57,7 @@ public class HTTPRequestReader {
         assumeCRLF();
         String header;
         while(!(header = readUntilCRLF()).isEmpty()) {
-            boolean hasParameters = header.indexOf(';') != -1;
+            boolean hasParameters = header.indexOf(';') != -1 && header.indexOf('=') != -1;
             String name = header.substring(0, header.indexOf(':'));
 			String value = HTTPUtils.decodeUTF8(header.substring(
                     header.indexOf(':') + 2, 
diff --git a/style.css b/style.css
index 0e27bf1..ef6bef3 100644
--- a/style.css
+++ b/style.css
@@ -6,4 +6,5 @@ center {
     margin: auto;
     display: block;
     max-width: 700px;
+    word-break: break-all;
 }