@misc{cryptoeprint:2016:217,
    author = {Eric R. Verheul},
    title = {Practical backward unlinkable revocation in FIDO, German e-ID, Idemix and U-Prove},
    howpublished = {Cryptology ePrint Archive, Report 2016/217},
    year = {2016},
    url = {https://eprint.iacr.org/2016/217},
}