ZkLedger
https://eprint.iacr.org/2018/241.pdf
zkLedger Privacy-Preserving Auditing for Distributed Ledgers
https://github.com/mit-dci/zkledger
https://blog.acolyer.org/2018/05/31/zkledger-privacy-preserving-auditing-for-distributed-ledgers/
The transaction format grows linearly with the number of participants in the system.
NSDI'18
https://www.youtube.com/watch?v=zpVc0p9RgFk
https://www.youtube.com/watch?v=yKa-KxY-YJk
https://www.youtube.com/watch?v=qpGVXWMjb2s