Theories of Cryptocurrency, Block chain and Distribution Systems. Understanding the emerging abstract models doe Block chain and Bitcoin Security, Application of block Chain, Byzantine fault tolerance, Security of Blockchain and decentralized schemes, attacks on Block Chain systems, Light weight protocols and algorithms based on block chain, block Chain Based IoT solutions, Block chain in crowdsourcing and crowdsensing, Block chain in Cyber Physical Systems, Block chain in Social Networking, block chain in 5G, Block Chain in edge and Cloud Computing, Block chain and Trust managements, Business Model destruction/creation caused by Block chain, Business value of blockchain.