This is generally considered an unsolvable problem when trying to fulfill all of these requirements (cf. sibling post). Most subsets are easy, but not the full list.
Sybil attacks are when you attack something with a vast number of identities. The whole point of what I am suggesting is that you limit the number of identities to one.
This is generally considered an unsolvable problem when trying to fulfill all of these requirements (cf. sibling post). Most subsets are easy, but not the full list.