identity_private =>
  { identity_public =>
      { source  => 'file:///home/markov/.cpan6/archive-private'
      , name    => 'markov-public-id'
      , version => 0
      }
  , authorization =>
      { authentication =>
          { algorithm => 'basic'
          , realm     => 'login'
          , param => { name => 'user',     _ => 'markov' }
          , param => { name => 'group',    _ => 'users'  }
          , param => { name => 'password', _ => ''       }
          , destination =>
             { host => [ 'earth' ]
             , service => [ 'ssh', 'login' ]
             }
          }
       }
  };