>Neither mode is encrypted: whatever is on the sending screen is readable by any camera pointed at it. Something like this would be good for transferring the p

>Neither mode is encrypted: whatever is on the sending screen is readable by any camera pointed at it. Something like this would be good for transferring the public key(s) associated with some cryptographic messaging identity. This would allow that to happen entirely offline. The optical nature of the transfer would prevent a potential MITM. The idea that an identity is being transferred would be fairly easy to impart to the user. So the lack of encryption would be a feature and not a bug. This would enable later encryption which could then use any medium for the transfer in a completely secure way.