Users familiar with Zcash's Zaddress type will know about shielded transactions. The viewing key will enable you to show your transactions with a third party without giving the viewer authority to move your funds. The information an owner sees will now be visible to whoever has a viewing key.
Have you participated in the Zcash Community Advisory Panel?
There is a vote coming up for the Major Review Grant Committee and ZCAP members are asked to participate.
Zcash Community Forum MGRC Megathread