[Privacy-pass] A related work: privacy-preserving asynchronous Single Sign-On (EL PASSO)

[Zhiyi Zhang <[e-mail]>]

Dear all,

We have been working on privacy-preserving Single Sign-On and we found our
work, called EL PASSO, is very closely related to Privacy Pass.
EL PASSO implements anonymous credentials, enables selective attribute
disclosure, and allows users to prove properties about their identity
without revealing it in the clear.
We also have accountability designed in: when a user misbehaves on a
relying party, the relying party can report the user to authorities to
reveal the identity of that user.
There are other interesting features in EL PASSO like inter-RP
unlinkability and intro-RP linkability that can provide desired security
properties.

A preprint version can be found on arXiv: https://arxiv.org/abs/2002.10289
and a final version will appear in PETS 2021.
We hope this work can provide some useful input to Privacy Pass and we are
also looking forward to future collaborations with Privacy Pass :D

Best,
Zhiyi