Reverse engineering an e-ink display
I wonder if there are larger implications to reverse-engineering this. When I worked in retail in high school, I was told repeatedly that if a price was marked on a shelf, then there are laws that require the store to sell that item for that marked price. (IANAL so I don&#x27;t know the nuances there, but it makes sense). If it becomes easy to change these displays with a new price wirelessly, that could be a really nasty problem for any stores using these displays.<p>Hopefully for the store&#x27;s sake, there&#x27;d be some sort of public&#x2F;private key system so that only the holder of the private key can distribute price changes wirelessly. I wouldn&#x27;t bet money on that though.<p>(edit) - I see someone else posted the manual and that there&#x27;s a per-site AES key. That&#x27;s a good sign I guess.