It does not use POSIX ACLs, extended attributes, nor any other
security-related functions which require non-standard Perl modules.
+There is preliminary support for "virtual users", but it is
+incomplete and undocumented.
+
=head1 INTERNAL FILES
lei runs with a umask of 077 to prevent other users on the
usernames and passwords. These passwords are not encrypted in
memory and get transferred across processes via anonymous UNIX
sockets and pipes. They may be exposed via syscall tracing
-tools (e.g. L<strace(1)>).
+tools (e.g. L<strace(1)>), kernel and hardware bugs/attacks.
While credentials are not written to the filesystem by default,
it is possible for them to end up on disk if processes are