gnupg: Trust Values

 
 8 Trust Values
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 Trust values are used to indicate ownertrust and validity of keys and
 user IDs.  They are displayed with letters or strings:
 
 -
 unknown
      No ownertrust assigned / not yet calculated.
 
 e
 expired
 
      Trust calculation has failed; probably due to an expired key.
 
 q
 undefined, undef
      Not enough information for calculation.
 
 n
 never
      Never trust this key.
 
 m
 marginal
      Marginally trusted.
 
 f
 full
      Fully trusted.
 
 u
 ultimate
      Ultimately trusted.
 
 r
 revoked
      For validity only: the key or the user ID has been revoked.
 
 ?
 err
      The program encountered an unknown trust value.