There are other techniques that aren't generally included in the "Zero Knowledge Proofs" set of techniques that are perhaps more practical for general developme

There are other techniques that aren't generally included in the "Zero Knowledge Proofs" set of techniques that are perhaps more practical for general development. For example, I find private set intersection[1] as implemented by OpenMined a really useful primitive a bunch of privacy enhancing applications can be built on top of. My colleagues and I recently published a pre-print[2] showing how to use this for sharing locations you and another person have had in common, without being able to see other locations. The paper talks about a social network built around this but I also think there are useful applications in things like real-world games (scavenger hunts etc) [1] https://github.com/OpenMined/PSI/blob/master/private_set_intersection/javascript/README.md https://github.com/OpenMined/PSI/blob/master/private_set_int... [2] https://arxiv.org/abs/2210.01927 https://arxiv.org/abs/2210.01927