Secure Identity Authentication Protocol Based on Blockchain in Smart Home

A smart home is an Internet of Things application that allows users to access and control smart devices. However, there are some shortcomings in terms of data security in smart homes. Thus, a safe identification solution with high efficiency was needed in this scenario. This paper presented a smart home user verification scheme based on blockchain technology. By combining environmental perception with historical record, this scheme can prevent password guessing and other attack behaviors. Finally, we analysed the communications costs and computational costs of this solution in relation towards those of another existent solution. Comparative results show that our programme is more efficient, safer and viable.