One use case of ZK is to solve the problem of trustlessness. For example, the typical use case is zk-rollups and outsourced computing. Another use case is the privacy issue. The current exploration of such scenarios includes privacy transactions, privacy games, privacy social, and privacy DID. The most popular one now is zkevm (that is, outsourced computing) and various rollups for zk. However, in the first use case, the problem of trustlessness is solved. There should be more scenarios to explore. Welcome to discuss
