I wonder: are there any real-world practical applications using the Paillier cryptosystem , as introduced in , or some derivations of it?
I'm aware of quite a few schemes proposed in literature how to use it for voting, zero-knowledge proofs and such, and also of many prototypical implementations online, but I can't seem to find any application where a Paillier(-based) scheme was effectively used...(also, I don't think there is any standard defining it).
 Paillier, Pascal (1999). "Public-Key Cryptosystems Based on Composite Degree Residuosity Classes". EUROCRYPT. Springer. pp. 223–238