The authors of RFC 9285 explicitly talk about QR codes. They may be able to share more about their use cases and protocols. Russ > On Jul 17, 2023, at 11:53 AM, Robert Moskowitz <rgm-ietf@xxxxxxxxxxxxxxx> wrote: > > Is there an existing protocol to transfer a data file via QR codes? > > Say one computer shows a QR code on it screen and the second "reads" it. > > It displays a ACK QR code that the 1st can read. > > and so forth. > > The application is for a disconnected system to "safely" receive a data file to inspect and use and have a high degree of confidence that nothing else is sneaking through. > > I want this for transfering a PKIX CSR to an offline signing CA that would then respond with the cert (or a NAK to the CSR). > > See > > https://datatracker.ietf.org/doc/draft-moskowitz-drip-dki/ > > For the actual use case. > > I will be at IETF and am interested in working on this on Linux (Fedora 38). > > thanks! > > Bob >