Most signs are completely insecure already. This exact tech, with no security, is already used for item/price displays in some stores. If you're worried about s

Most signs are completely insecure already. This exact tech, with no security, is already used for item/price displays in some stores. If you're worried about someone walking up and reprogramming your nfc powered eink sign, I'd love to hear why you need a secure but wirelessy powered sign.