
The Petya ransomware cyberattack hit computers of Russian and Ukrainian companies on 27 June 2017. Photo by Donat Sorokin/TASS/Getty.
Hostile cyber operations by one state against another state are increasingly common. This paper analyzes the application of the sovereignty and non-intervention principles in relation to states’ cyber operations in another state below the threshold of the use of force.
Harriet Moynihan is an associate fellow in the International Law Programme at Chatham House, a research visitor at the Bonavero Institute of Human Rights at the University of Oxford, and a visiting fellow of Mansfield College, Oxford. Before joining Chatham House, Harriet was a legal adviser at the Foreign & Commonwealth Office, where she advised on a wide range of international law issues. Prior to that, Harriet was an associate solicitor in the antitrust department of Clifford Chance LLP, where she worked in the firm’s London and Singapore offices.