diff --git a/parabotv2/src/org/parabot/core/Context.java b/parabotv2/src/org/parabot/core/Context.java
index e82a2b9..2b7e2e9 100644
--- a/parabotv2/src/org/parabot/core/Context.java
+++ b/parabotv2/src/org/parabot/core/Context.java
@@ -182,7 +182,7 @@ public class Context {
         gameApplet.setSize(appletSize);
         panel.add(gameApplet);
         panel.validate();
-        
+
         gameApplet.init();
         gameApplet.start();
         java.util.Timer t = new java.util.Timer();
diff --git a/parabotv2/src/org/parabot/core/Core.java b/parabotv2/src/org/parabot/core/Core.java
index c59adf8..ed40931 100644
--- a/parabotv2/src/org/parabot/core/Core.java
+++ b/parabotv2/src/org/parabot/core/Core.java
@@ -1,9 +1,17 @@
 package org.parabot.core;
 
+import org.parabot.Landing;
 import org.parabot.environment.api.utils.WebUtil;
 
 import java.io.BufferedReader;
+import java.io.File;
 import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.security.DigestInputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 
 /**
  * The core of parabot
@@ -88,18 +96,62 @@ public class Core {
     }
 
     /**
-     * Checks for updates.
-     *
-     * @return <b>true</b> if no update is required, otherwise <b>false</b>.
+     * Checks the version of the bot using a checksum of the jar comparison against checksum given by the website
+     * @return <b>true</b> if no new version is found, otherwise <b>false</b>.
      */
-    public static boolean isValid() {
-        Core.verbose("Checking for updates...");
+    private static boolean checksumValid(){
+        String checksum = "";
+
+        File f = new File(Landing.class.getProtectionDomain().getCodeSource().getLocation().getFile());
+        if (f.isFile()) {
+            try {
+                MessageDigest md = MessageDigest.getInstance("MD5");
+                try (InputStream is = Files.newInputStream(Paths.get(f.getAbsolutePath()))) {
+                    DigestInputStream dis = new DigestInputStream(is, md);
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                byte[] digest = md.digest();
+
+                for (byte aDigest : digest) {
+                    checksum += Integer.toString((aDigest & 0xff) + 0x100, 16).substring(1);
+                }
+            } catch (NoSuchAlgorithmException e) {
+                e.printStackTrace();
+            }
+        }
+
+        //TODO Get checksum from BDN and verify
+//        BufferedReader br = WebUtil.getReader(Configuration.GET_BOT_VERSION);
+//        try {
+//            double version = Double.parseDouble(br.readLine());
+//            if (Configuration.BOT_VERSION != version) {
+//                Core.verbose("Updates available...");
+//                return false;
+//            }
+//        } catch (NumberFormatException | IOException e) {
+//            e.printStackTrace();
+//        } finally {
+//            try {
+//                br.close();
+//            } catch (IOException e) {
+//                e.printStackTrace();
+//            }
+//        }
+
+        return true;
+    }
+
+    /**
+     * Checks the version of the bot using a variable comparison from the bot code and the Parabot website
+     * @return <b>true</b> if no new version is found, otherwise <b>false</b>.
+     */
+    private static boolean versionValid(){
         BufferedReader br = WebUtil.getReader(Configuration.GET_BOT_VERSION);
         try {
             double version = Double.parseDouble(br.readLine());
-            if (Configuration.BOT_VERSION >= version) {
-                Core.verbose("No updates available.");
-                return true;
+            if (Configuration.BOT_VERSION < version) {
+                return false;
             }
         } catch (NumberFormatException | IOException e) {
             e.printStackTrace();
@@ -110,8 +162,25 @@ public class Core {
                 e.printStackTrace();
             }
         }
-        Core.verbose("Updates available...");
-        return false;
+
+        return true;
+    }
+
+    /**
+     * Checks for updates.
+     *
+     * @return <b>true</b> if no update is required, otherwise <b>false</b>.
+     */
+    public static boolean isValid() {
+        Core.verbose("Checking for updates...");
+
+        if (versionValid() && checksumValid()){
+            Core.verbose("No updates available.");
+            return true;
+        }else{
+            Core.verbose("Updates available...");
+            return false;
+        }
     }
     
     public static void debug(int i) {
diff --git a/parabotv2/src/org/parabot/core/network/NetworkInterface.java b/parabotv2/src/org/parabot/core/network/NetworkInterface.java
index 3610d25..2751dc5 100644
--- a/parabotv2/src/org/parabot/core/network/NetworkInterface.java
+++ b/parabotv2/src/org/parabot/core/network/NetworkInterface.java
@@ -2,6 +2,9 @@ package org.parabot.core.network;
 
 import java.net.InetAddress;
 import java.net.SocketException;
+import java.util.ArrayList;
+import java.util.Enumeration;
+import java.util.NoSuchElementException;
 
 public class NetworkInterface {
 	public static byte[] mac = new byte[] { 11, 11, 11, 11, 11, 11 };
@@ -19,6 +22,27 @@ public class NetworkInterface {
 		return mac;
 	}
 
+	public static Enumeration<NetworkInterface> getNetworkInterfaces()
+			throws SocketException {
+		final ArrayList<NetworkInterface> netifs = new ArrayList<>();
+
+		return new Enumeration<NetworkInterface>() {
+			private int i = 0;
+			public NetworkInterface nextElement() {
+				if (i < netifs.size()) {
+					NetworkInterface netif = netifs.get(i++);
+					return netif;
+				} else {
+					throw new NoSuchElementException();
+				}
+			}
+
+			public boolean hasMoreElements() {
+				return (i < netifs.size());
+			}
+		};
+	}
+
 	public static byte[] getRealHardwareAddress() throws SocketException{
 		if (realMac != null)
 			return realMac;