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Re:FIDO2 security key company releases hardware that's open ... by baq on Saturday February 13, 2021 @11:37AM (#26124563)
Nonono. We absolutely should recommend having at least 2. See also: car keys, house keys, any other physical lock you can get comes with at least 2 keys.

The default product sold should be a two key bundle.

Re:FIDO2 security key company releases hardware that's open ... by damnyou on Saturday February 13, 2021 @02:53PM (#26126193)
With your house keys you can walk into any hardware store and get as many duplicates as you like. With a U2F key that is prohibited.

U2F desperately needs a layer of indirection that doesn't currently exist.