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LeoWandersleb | 3 months ago (raw) | root | parent | reply | flag +2 
 It's minimal additional data that fits comfortably into your BBQRs. Why bring up USB here?
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NVK | 3 months ago (raw) | root | parent | reply | flag 
 The current spec used for this protocol is over usb and custom hwi.

Ideally there would be an extra field on PSBT. And the clients would include in it. We would taken take it and sign it. And to feel comfortable I want to see core with a proposed implementation of the client side. 

Messing with nonces is dangerous as fuck.
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MF_HODL | 3 months ago (raw) | root | parent | reply | flag 
 Makes sense, USB is a cluster fuck.

I don’t get it then… how is BitBox claiming to do this securely?
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NVK | 3 months ago (raw) | root | parent | reply | flag +1 
 They claim airgap is bad or something 😂