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If size doesn't matter, U2F Zero [1] is an open u2f security key. And we're about to unveil the upgrade to fido2... Edit: added link [1] https://u2fzero.com h

• ZiiS 8y ago
  Here is my more compact layout [1]. Twice the Tomu, but at a certain point that just makes it easier to extract. The big advantage of tomu's size is you can leave it in a laptop port, but that is the last thing you want to do with a security device. [1] https://github.com/BarnabyShearer/u2f-zero https://github.com/BarnabyShearer/u2f-zero