R. Mahalakshmi, D. Selvanayagi
Currently, the world is experiencing a strong rush towards modern technology, while specialized companies are living a terrible rush in the information technology towards the so-called Internet of things IoT or Internet of objects,Blockchain, the foundation of Bitcoin, has received extensive attentions recently. Block chain serves as an immutable ledger which allows transactions take place in a decentralized manner. Block chain-based applications are springing up, covering numerous fields including financial services, reputation system and Internet of Things (IoT), and so on. However, there are still many challenges of block chain technology such as scalability and security problems waiting to be overcome. This paper presents a comprehensive overview on block chain technology. We provide an overview of block chainarchitecture firstly and compare some typical consensus algorithms used in different block chains. Furthermore, technical challenges and recent advances are briefly listed. We also lay out possible future trends for block chain.
Internet of things (IoT), Smart Communication, Sensors, Actuators, System integration, Smart house/city, Network interface Block chain, decentralization, consensus, scalability