[j16sdiz]

When it works, it works great. But how about when it don't?

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Passkey - what would happens when we lost the device? You need some kind of recovery, right?

Social recovery - of course you could do that. Are you doing one recovery for all accounts (which require some kind of "wallet" stored in a centralized location - and can be disabled)? Or one for each services (which may make your grinder account known to your family)?

How about tourists? When you lost your phone while you are traveling in other country, what should you do?

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[ilovefood]

Fair point and it's still a domain of research. The GNU project works on something quite cool I think, called Anastasis. If we solve these things & make them easy, it's a win.