How to keep people from reading

[ArMaP]

I would add another aspect to digitization: bitrot.

I just the other day found a CF card from and old digital camera that stopped working sometime around 2011. Sadly, nothing fantastic on the card, just a bunch of pictures of me looking like I'm trying to figure out what's wrong with the camera. However, all of the images showed signs of significant bitrot and some were completely inaccessible.

I think this is something to keep in mind.

All those things are considered when talking about digital preservation, along with format obsolescence. That's one of the reasons historical archives should save their scanned documents as uncompressed TIFFs, as that way the image can be shown even if some bits were damaged, while a compressed image needs to be completely good to be decompressed.
Or we can add parity files, but few people use them, as there is no real standard.