Jigsaw
Each of my jigsaws is a combination of two images, which have been cut to an identical pattern. By swapping pieces between the two, the pictures become physically encrypted and, as a result, effectively censored, even though all of the constituent parts of the original pictures remain in place.
The two images could be returned to their original, “exposed” form by swapping the pieces back. For this reason, the jigsaws are designed to be separated so that while each contains a complete image, it can never be decoded. No complete jigsaw pair should ever be owned by one person.