Cyber Warfare

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France Speaks Out on IHL and Cyber Operations: Part I

The French Ministry of the Armies (formerly the Ministry of Defense) has recently released Droit International Appliqué aux Opérations dans le Cyberspace (International Law Applicable to Operations in Cyberspace), the most comprehensive statement on the applicability of international law (IHL) to cyber operations by any State to date.  The position paper dealt definitively with many of the current unsettled issues at the forefront of governmental and scholarly discussions. This two-part post builds on an earlier post at Just Security in which I examined the position paper’s treatment of the relationship between peacetime international law, including that set forth in the UN Charter regarding uses of force, and hostile cyber operations. The focus here, by contrast, is on France’s views as to how IHL applies in the cyber context. Key topics addressed in the paper include the applicability of IHL in cyberspace; classification and geography of cyber conflict; the meaning of the term “attack” in the cyber context; the legal nature of data during an armed conflict; and other significant IHL prohibitions, limitations, and requirements…

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Un-caging the Bear? A Case Study in Cyber Opinio Juris and Unintended Consequences

On October 4, the United Kingdom’s National Cyber Security Centre (NCSC), a division of the GCHQ, issued a news release attributing multiple cyber campaigns to Russia’s military intelligence service, the GRU. They were, according to the NCSC, designed to ‘undermine [the] international sporting institution WADA [World Anti-Doping Agency], disrupt transport systems in Ukraine, destabilise democracies and target…

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Reinventing Multilateral Cybersecurity Negotiation after the Failure of the UN GGE and Wannacry: The OECD Solution

While the failure of cyber security negotiations under the auspices of the UN GGE has created a huge void in international regulation, recent cyber-attacks with global reach have shown that action is more urgent than ever. Reflection on standards, good practices and norms should include private sector actors who are often the first victims of cyber-attacks. We consider…

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The Fifth Transatlantic Workshop on International Law and Armed Conflict: Introduction to a Joint Blog Series

Over the coming weeks, three blogs - Intercross, EJIL:Talk!, and Lawfare - will host a joint blog symposium on International Law and Armed Conflict. The series will feature posts by some of the participants at the Fifth Annual Transatlantic Workshop on International Law and Armed Conflict, which was held at the European University Institute in Florence…

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The NotPetya Cyber Operation as a Case Study of International Law

The recent “NotPetya” cyber-operation illustrates the complexity of applying international law to factually ambiguous cyber scenarios. Manifestations of NotPetya began to surface on 27 June when a major Ukrainian bank reported a sustained operation against its network. The Ukrainian Minister of Infrastructure soon announced ‘an ongoing and massive attack everywhere’.  By the following day, NotPetya’s impact was…

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