Tallinn Manual
22 Articles

The Technicolor Zone of Cyberspace – Part I
Two leading experts on cyber law analyze the U.K. Attorney General's major speech on international law and cyber, delivered at Chatham House last month.

United Kingdom Att’y General’s Speech on International Law and Cyber: Key Highlights
On Wednesday, the United Kingdom’s Attorney General, Jeremy Wright, QC MP, gave a speech at Chatham House on the role of international law in cyberspace. It is the first official…

Cyber Operations and the U.S. Definition of “Armed Attack”
[Ed. Note: Based on Goodman's remarks at U.S. Cyber Command’s Annual Legal Conference.]
A widely accepted view of the UN Charter is that a State can use force…
A widely accepted view of the UN Charter is that a State can use force…

WannaCry and the International Law of Cyberspace
Immediately following this May’s “WannaCry” ransomware cyber-attacks, the United Kingdom’s National Cyber Security Centre (NCSC) speculated that the hacker group “Lazarus”—believed…

Why a Broad Definition of “Violence” in Cyber Conflict is Unwise and Legally Unsound
International Humanitarian Law (IHL, aka the Law of Armed Conflict) is not intended to outlaw conflict. It is meant to regulate conflict in order to reduce its impact on civilians…

Tallinn Manual 2.0 – Advancing the Conversation
On Wednesday last week I had the privilege of attending the Washington, D.C. launch of the Tallinn Manual 2.0 on the International Law Applicable to Cyber Operations at the Atlantic…

Tallinn Manual 2.0 on the International Law of Cyber Operations: What It Is and Isn’t
This week marked the release of Tallinn Manual 2.0 on the International Law of Cyber Operations, the result of the follow-on project that led to the publication of the Tallinn…

Watch the Tallinn Manual 2.0 Launch Discussion Online
Today marks the launch of Tallinn Manual 2.0, a key text on how existing international law applies to cyber operations. It was authored by 19 international law experts, and Just…

US Transparency Regarding International Law in Cyberspace
Last Thursday, State Department Legal Adviser Brian Egan, delivered an important speech at Berkeley Law School on the relationship between international law and cyber activities. …

Was the Cyber Attack on a Dam in New York an Armed Attack?
Concerns about the vulnerability of infrastructure to cyber attacks were highlighted in two recent news articles. Last month, the Wall Street Journal reported that in 2013, Iranian…