@InProceedings{popets21,
  author =       " {Iñigo Querejeta Azurmendi, Panagiotis Papadopoulos,
                 Matteo Varvello, Jiexin Zhang, Antonio Nappa} and
                 Benjamin Livshits",
  title =        "{zkSENSE}: A Friction-less Privacy-Preserving
                 {HumanAttestation} Mechanism for Mobile Devices",
  booktitle =    "Proceedings on Privacy Enhancing Technologies",
  month =        jul,
  year =         "2021",
}