Anyone interested in "Triple Blind" PG via VASSAL?

[Schoenwulf]

It's really nice. Hide/Unhide becomes a right-click option, and when hidden the unit's opacity is slightly reduced for you and they are invisible for the opponent. It's perfect for refereed play because the judge can still see everything.

That is pretty neat. The only issue would be situations where one has hidden movement; with the encrypted file, movement can be tracked and verified once the unit is discovered. Funny how one can use VASSAL for years and never notice things like that.