Is there other examples of using
zk-SNARK for supporting "private transactions" except Zerocoin or Zchach ? (For example, is it possible to use
zk-SNARK for health data ? or any other use cases in which the data privacy is important ?)
The only example I found was related to the "payment use case" such as Zerocash . Does it mean
zk-SNARK use case in blockchain is limited to use it only in the payment use case ?
Is there other research papers on using
zk-SNARK for supporting data privacy and private transactions in the blockchain except payment use case?