Devices unique identifier

Now I could have just got the MAC address and used that to communicate with the server, but I wanted to take it to the extremes. Mainly because I wanted to obscure the communication with the previous methods of encryption so the server can identify which device is making a request.

For this I create a string using the devices host name and all the network interfaces connected to it with their MAC addresses. Although I might change this in the near future, at the moment, this gives a good length string for the server to identify the device.

Below is the code used to create this identity string.

    public String host;
    
    private void testMACAddress() {
        try {
            InetAddress ip = InetAddress.getLocalHost();
            
            host = ip.getHostName();

            Enumeration&ltNetworkInterface&gt networks = NetworkInterface.getNetworkInterfaces();
            while (networks.hasMoreElements()) {
                NetworkInterface network = networks.nextElement();
                byte[] mac = network.getHardwareAddress();

                if (mac != null) {
                    StringBuilder sb = new StringBuilder();
                    
                    for (int i = 0; i &lt mac.length; i++) {
                        sb.append(String.format("%02X%s", mac[i], (i &lt mac.length - 1) ? "-" : ""));
                    }
                    
                    host += " " + network.getDisplayName() + " " +  sb.toString();
                }
            }
        } catch (UnknownHostException | SocketException e) {
            System.out.println(e.getMessage());
        }
    }

As mentioned above, this identity string will then be encrypted and sent to the server. Further communication will commence if the server accepts it.

Leave a Reply

Your email address will not be published.