nostr:npub13azv2cf3kd3xdzcwqxlgcudjg7r9nzak37usnn7h374lkpvd6rcq4k8m54 Nostr needs to solve the metadata problem. It may encrypt messages but offers no privacy regarding who is contacting whom. This problem has already been solved by mixnets, onions, and floodnets. Pick one ...