Sort:  

Don't think there is one - well, there's Haven (XHV) which has what they call an offshore vault for that purpose, but i'm not sure if its promising.

My wish is to get HBD on Zano as a confidential asset (once this can be done after the upcoming Zarcanum fork).

It can be done apparently, i discussed with Dev & tried ti get attention of Hive Devs but to no avail.

Yeah, #ZANO is very promising.
With anonymous zHBD lockable in deposit, Hive could moon, imo.