[YurgenJurgensen]

Using encryption is not uncommon. This particular use of language may be uncommon (I don't know if it is, that's something for the prosecution to demonstrate). So if it is, the equivalent metaphor would be some extraordinary lengths taken to conceal data, like perhaps "The police found empty bags that once contained powdered iron oxide and aluminium in the defendant's house, their desktop computer was found to have recently been moved and contained more SATA connectors than necessary for the components it contained, and there was a suspicious number of melted computer parts and HDD caddy screws in their garbage."