Cyber Operations

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Functional Immunity and “Covert Violent Acts”: The BGH’s Progressive Development of CIL in the Nord Stream Case

On 10 December 2025, the German Federal Court of Justice (Bundesgerichtshof, BGH) delivered its order (StB 60/25, English press release available here) in the criminal case against Serhiy K., accused of participating in the destruction of the Nord Stream 1 and 2 pipelines in September 2022. K.'s defence raised functional immunity as a procedural bar, arguing that K. acted as an officer of the Ukrainian armed forces on official orders during the ongoing armed conflict with Russia.

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Some Further Thoughts on the Illegal US Attack on Venezuela: Self-Defence, Cyber, and Continuing Coercion

In this post, I want to provide a couple of thoughts on some aspects of the unlawful US attack on Venezuela on 3 January. Before doing so, however, I should simply say that I completely endorse the analyses of colleagues here on EJIL: Talk! and on Just Security. The illegality of the US…

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ICC Office of the Prosecutor Releases Draft Policy on Cyber-Enabled Crimes

This article is cross-posted at Lawfare. On March 6, the Office of the Prosecutor of the International Criminal Court (ICC) published a draft Policy on cyber-enabled crimes, which is now open for public consultation. States and non-state actors are increasingly using advanced cyber tools, including artificial intelligence (AI), to commit or facilitate crimes against international law. This…

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Proxy Countermeasures in International Law

Introduction  In the last few years, the term ‘collective countermeasures’ has at times been used to refer to two conceptually distinct claims. It has continued to be used to refer to the idea that a State other than an injured State, in the sense of Article 48 of the ILC Articles on State Responsibility, may take…

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The Prosecutor’s New Policy on ‘Cyber Operations’ before the International Criminal Court (and its Implications for Ukraine): Some Preliminary Reflections

In late August, the International Criminal Court’s (ICC) chief prosecutor, Karim A. A. Khan, published a little-noticed op-ed with Foreign Policy Analytics discussing the potential for the ICC to prosecute ‘cyberattacks’ as international crimes pursuant to the Rome Statute (RS). A cyberattack, according to the Tallinn Manual 2.0, is a ‘cyber operation,…

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