In the next-generation computing, the role of cloud, internet, and smart devices will becapacious. Nowadays we all are familiar with the word smart. This word is used a number of times in ourdaily life. The Internet of Things (IoT) will produce remarkable different kinds of information fromdifferent resources. It can store and process big data in the cloud. The fogging acts as an interface betweencloud and IoT. The IoT nodes are also known as fog nodes, these nodes are able to access anywhere withinthe range of the network. The blockchain is a novel approach to record the transactions in a sequencesecurely. Developing new blockchains based integrated framework in the architecture of the IoT is one ofthe emerging approaches to solving the issue of communication security among the IoT public nodes. Thisresearch explores a novel approach to integrate blockchain technology with the fog and IoT networks andprovides communication security to the internet of smart devices. The framework is tested andimplemented in the IoT network. The results are found positive.