FG

What is a GPG with "authenticate" capability used for?

Fresh3 days ago
Mar 15, 202614142 views
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Problem

GnuPG subkeys can be flagged with three kind of capabilities: Sign, Encrypt and Authenticate. While the first two actions are widely used and documented, the authenticate action is somehow mysterious. You can make such key only using editing a primary key with the option: There are rumors about GPG…

Error Output

$ gpg --expert --edit-key 889C36B7
gpg (GnuPG/MacGPG2) 2.0.17; Copyright (C) 2011 Free Software Foundation, Inc.
gpg> addkey    
...                 …

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Fix for: What is a GPG with "authenticate" capability used for?

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OpenPGP keys can be used for authentication in various protocols: SSH, as bare ssh-rsa keys ( , or smartcards) SSH, as pgp-sign-rsa certificates (no implementations known to me) TLS according to RFC 5081 (supported by GnuTLS) of course, less well-kn…

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