Why is ~/.gnupg/trustdb.gpg readable by all?

[Steven E. Harris]

Dan Harkless <gnupg@dilvish.speed.net> writes:

> the default permissions on ~/.gnupg are rwx------, are they not?

On my Debian 2.2 system, ~/.gnupg looks like

,----
| drwx--S---
`----

I don't understand the "S." The info node on "ls" says:

> If the setuid or setgid bit is set but the corresponding executable
> bit is not set.

What does having this bit set achieve?

-- 
Steven E. Harris        :: steven.harris@tenzing.com
Tenzing                 :: http://www.tenzing.com