The reality of the Blockchain is the decentralized level of security thus avoiding single point of failures. Npw since the evolvement of IoT devices this is becoming prevalent to adopt the Block chain this decentralized security model will be easy and far less expensive in terms of scaling, maintaining and managing. Most importantly, it will not have a single point of failure. With the exponential increase in devices, it becomes quite difficult to identify, authenticate and secure devices. With the introduction of blockchain, authentication and identification of devices will be secured over distributed database technology. Each IoT node can be registered and authenticated in the blockchain and will have a unique ID and address. Thus, it will help in unique identification of the device. If any device wants to connect with another device, it will use its unique blockchain ID and its local blockchain wallet to raise a request. The wallet will create a unique digitally signed request using a key and send it to the target device, which in turn will use blockchain services to validate the signature using the public key of the sender. This is how machine to machine authentication can happen without the need for any centralized support system.
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