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Oliwer Sobolewski

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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 · 0 citations