mysticwill.com

A mystic will is a will prepared by or at the instance of a testator, sealed up in an envelope, acknowledged on the outside of the envelope, and executed in accordance with required formalities before a notary.
In a age where everything become digital – and crackable – only phisycal documents may guaranteee secrecy.
The scheme of the mystic will may then be adopted to guarantee secrecy of certain documents.