Different signing & encryption keys

[Robert J. Hansen]

> How do you tell which one is which?  It used to be that the 'D' prefix
> meant DSA, which was signing only, and 'g' or 'G' was for el gammel
> signing or encryption, but now they all just show 'R'.

gpg --edit-key [keyID]

Look at the right hand side.  For each subkey (including the main
signing key) there will be an entry for "usage".  This field can contain
the letters S, C, A, or E.

S = Sign
C = Certify
A = Authenticate
E = Encrypt