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Re:Show HN: SeKey: An SSH Agent for OS X, Using Secure Encla... by viraptor on Tuesday December 05, 2017 @04:23PM (#15856151)
This shouldn't be a problem. Backing up a securely stored key is not a great solution. Instead you can generate a backup key that you provision everywhere as well, (the public part) but store completely offline.

Basically treat this the same as you would a physical 2fa token.

Re:Show HN: SeKey: An SSH Agent for OS X, Using Secure Encla... by DennisP on Tuesday December 05, 2017 @04:53PM (#15856377)
I'm thinking more about whether this could be used to store cryptocurrency keys, in place of a hardware wallet. It's a different elliptic curve (according to another HN commenter recently) but that's not necessarily a deal killer forever.

Without an export it could maybe be one key in a multisig.