Industrial Automatic Control Systems and Controllers Annotation << Back Combining Blockchain Technology and Multiversion Concurrenc Ccontrol for a Secure and Scalable Industrial Internet of Things System I.D. Kotelevets This article discusses data security and scalability of the Industrial Internet of Things (IIoT). The problems of hacking heterogeneous devices, bottlenecks of the architecture used in building IIoT are considered, and the features of the infrastructure of the Industrial Internet of Things, cloud platforms, and blockchain technology are analyzed. To solve these problems, it is proposed to jointly use blockchain technology and multiversion control parallelism, which provide maximum flexibility of the system with the possibility of vertical and horizontal scaling and secure data transfer. Keyword: Industrial Internet of Things; data secur; cloud system; blockchain; multiversion concurrency management. DOI: 10.25791/asu.2.2021.1257 Pp. 22-28.