The process of digital transformation of the economy, its digitalization, inevitably extends to such sensitive from the point of view of national, and even international, security spheres like the defense sector. The article discusses the possibility of using in the defense sector of the economy such technology as blockchain. This technology together with another perspective one - the Internet of things, underlies such a digital tool as smart contracts. The objective of this article is to consider the main advantages of their possible introduction into the process of manufacturing or procurement military products, as well as to outline some difficulties and identify the risks associated with this.