A flexible screen inspired in part by squid can store and display encrypted images like a computer—using magnetic fields rather than electronics.
It’s one of the first times where mechanical materials use magnetic fields for system-level encryption, information processing and computing. And unlike some earlier mechanical computers, this device can wrap around your wrist.
Full Paper:-
Janus Swarm Metamaterials for Information Display, Memory, and Encryption
Sounds like a magnetic variant of eink displays. Very cool!