Is it possible to configure ssh using PubkeyAuthentication yes but only allowing pub/private key pairs with a passphrases?
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mahatmanich
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1See this similar/related question: http://serverfault.com/q/82649/253490 – Castaglia Mar 25 '16 at 22:28
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Thanks for the heads up, I didn't find that question earlier when I searched sf. – mahatmanich Mar 25 '16 at 23:02
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No, the server has no knowledge of the protection used for the SSH key on the client.
It could be a passworded PEM file, a key loaded into an agent, stored on a smartcard, etc -- all the server knows is the client responded with the correctly signed response.
Jason Martin
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