Exploring Hidden Geographic Disparities in Android Apps

While mobile app evolution has been widely studied, geographical variation in app behavior remains largely unexplored. This paper presents a large-scale study of location-based Android app differentiation, uncovering two important and underexamined phenomena with security and fairness implication...

From Protest to Power Plant: Interpreting the Role of Escalatory Hacktivism in Cyber Conflict

Since 2022, hacktivist groups have escalated their tactics, expanding from distributed denial-of-service attacks and document leaks to include targeting operational technology OT. By 2024, attacks on the OT of critical national infrastructure CNI had been linked to partisan hacktivist efforts in...

Policy vs Technology

Sometime around 1993 or 1994, during the first Crypto Wars, I was part of a group of cryptography experts that went to Washington to advocate for strong encryption. Matt Blaze and Ron Rivest were with me; I don't remember who else. We met with then Massachusetts Representative Ed Markey. He didn'...

New Book Coming in September: "Click Here to Kill Everybody"

My next book is still on track for a September 2018 publication. Norton is still the publisher. The title is now Click Here to Kill Everybody: Peril and Promise on a Hyperconnected Planet, which I generally refer to as CH2KE. The table of contents has changed since I last blogged about this, and ...