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Secure connections with no keyboard and no display

Hello,

Our peripheral device has no keyboard and no display.

Yet we would still like to have the most secured way of communication.

For our application, we don't like a static passkey as anybody with the same mobile app installed could pair.

We are thinking about scanning a unique QR code on every device. Could the information be used to setup a secured link? Like with the "out of bounds" method?

kind regards

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