Are You Confident in Your Anonymisation Practices?
Nov 24, 2025
This week, we explore what truly counts as “anonymous” data and why the distinction from pseudonymisation matters for risk, compliance, and trust.
One YouTube Video
In this recorded Q&A from the Eyes-Off Data Summit 2025, Paul Comerford (ICO) and Rory O’Keeffe (RMOK Legal) dive into the practical meaning of anonymity, the grey area with pseudonymised data, and what organisations need to show regulators.
One Significant Decision
The Court of Justice of the European Union ruled that pseudonymised data may still count as personal for the original controller, but not for the recipient, if the recipient truly cannot reidentify the individual.
One Research Paper
This paper surveys how even aggregate statistics can leak sensitive information. It breaks down two key attack types: reconstruction, and tracing. It also shows how differential privacy offers provable protection against these risks.
