Open access
Oct 2026
Privacy Pass is Anamorphic: Practical Consequences and Attacks in the Black-box Model
It is proved that the three most prominent variants of Privacy Pass are anamorphic, which makes it insecure in a model where user's device or client application is working against them and can also be used to achieve a private metadata-like functionality.
Mirosław Kutyłowski, Oliwer Sobolewski
· Proceedings on Privacy Enhan... · 0 citations