Blockchain in Cyberdefence: A Technology Review from a Swiss Perspective

Abstract: Since the advent of bitcoin in 2008, the concept of a blockchain has widely spread. Besides crypto currencies and trading activities, there is a wide range of potential application areas where blockchains are providing the main building block for secure solutions. From a technical point of view, a blockchain involves a set of cryptographic primitives to provide a data structure with security and trust properties. However, a blockchain is not a golden bullet. It may be well suited for some problems, but often an inappropriate data structure for many applications. In this paper, we review the high-level concept of a blockchain and present possible applications in the military field. Our review is targeted to readers with little prior domain knowledge as a support to decide where it makes sense to use a blockchain and where a blockchain might not be the right tool at hand.