@misc{cryptoeprint:2021:203,
    author = {Tjerand Silde and Martin Strand},
    title = {Anonymous Tokens with Public Metadata and Applications to Private Contact Tracing},
    howpublished = {Cryptology ePrint Archive, Report 2021/203},
    year = {2021},
    url = {https://eprint.iacr.org/2021/203},
}