So if I'm right, there's only 8 bytes that are used for encryption key in the Libre 2 protocol. 64-bit is not much for a key. Are they just using DES? I have the cyphertext, and what I _think_ is the correct cleartext. What's my best option to figure this out?
Are they just trying to be annoying or is it a case of "regulations means we have to do this"? I know for example the FTC has stupid rules around what users should be allowed to do with wireless equipment, and routers / wireless NICs end up implementing DRM to enforce that...
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Nah, as far as I know there's no regulation requiring this. Not even HIPAA. Nevermind that this model only exists in Europe where the pressure would be on the other side altogether. Or that the previous models still exist.
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As for "why they are doing it at all?" Why would have LifeScan used a freaking serial-like-over-scsi-over-ums-over-usb?!?https://flameeyes.blog/2016/02/17/diabetes-control-and-its-tech-reverse-engineering-the-onetouch-verio/ …
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