Duncan Hollis



Duncan Hollis is Laura H. Carnell Professor of Law at Temple University Law School in Philadelphia. His scholarship engages with issues of international law, interpretation, and cybersecurity, with a particular emphasis on treaties and other forms of international agreement. He is the editor of the award-winning Oxford Guide to Treaties (2012, 2nd edition forthcoming 2020) and, together with Allen Weiner, the 7th edition of International Law, one of the leading U.S. textbooks. Professor Hollis is currently a non-resident Scholar at the Carnegie Endowment for International Peace and an elected member of both the American Law Institute and the OAS Inter-American Juridical Committee. In the latter role, he serves as Rapporteur for a project on improving the transparency of State views on international law’s application to cyberspace. Professor Hollis also studies—and participates in—global negotiating dynamics on state behavior in cyberspace, including regularly working with the Microsoft Corporation on its digital peace agenda.

Recently Published

The Oxford Statement on International Law Protections in Cyberspace: The Regulation of Ransomware Operations

In the past few months, nothing has reminded everyone of the etymology of the expression ‘computer virus’ like ransomware. This form of malicious code is delivered through a vulnerability in the victim’s system, such as a phishing email or password spraying, infiltrating and potentially crippling it like a disease. Specifically, ransomware is used to encrypt user data and…

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The Oxford Statement on International Law Protections in Cyberspace: The Regulation of Information Operations and Activities

The Internet has allowed the dissemination of content across the globe in a matter of seconds. Recommendation algorithms, found in social media platforms and search engines, have also dangerously amplified the reach of false, misleading, and violent content (see here, here, and here). Because they are geared towards…

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The Oxford Statement on International Law Protections Against Foreign Electoral Interference through Digital Means

Election insecurity constitutes a dangerous global threat. Thirteen prominent intelligence experts stated, in a brief filed in U.S. federal court, that: “Over the last several years, evidence has emerged that Moscow has launched an aggressive series of active measure campaigns to interfere in elections and destabilize politics in Montenegro, Ukraine, Moldova, France, Germany, the Netherlands, Estonia, Sweden,…

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