**zk-PoI**
  ------------------------ ---------- ---------- ---------- ---------- ---------- ---------- ------------
     (Pseudo)-Anonymity                           $\times$              $\times$                 ****
      Energy-Efficient      $\times$                                                             ****
   Economically Efficient   $\times$   $\times$   $\times$   $\times$              $\times$      ****
       Permissionless                                                   $\times$   ([\*]{})      ****

Proof-of-Personhood Considered Harmful (and Illegal)
----------------------------------------------------

To be considered lawful in the real world, Proof-of-Personhood (PoP, [@pop]) requires the concurrence of multiple unrestricted freedoms: assembly, association, and wearing of masks. However, in most countries these freedoms are limited:

-   freedom of assembly[@freedomAssembly] and association[@freedomAssociation]: most countries usually require previous notification and permission from the governing authorities, that may reject for multiple grounds including but not limited a breach of public order. Thus, PoP cannot be considered permissionless in these countries.

-   it’s forbidden to wear a mask in most countries[@antiMaskLaw], as required for the anonimity of PoP (“All parties are recorded for transparency, but attendees are free to hide their identities by dressing as they wish, including hiding their faces for anonymity.”, [@pop]). Thus, PoP won’t be anonymous in countries that outlaw the covering of faces.

-   promoters and organizers of PoP parties may themselves be committing a crime, due to incitement, conspiracy and complicity.

The solution proposed in this paper it’s the only possible lawful one according to current regulations that 