Secure cvsup access?

[Colin Percival]

   Is there any mechanism in place for secure cvsup access, and if so, who 
should I talk to about it?
   Right now I'm building and publishing binary security updates (see 
ports/security/freebsd-update) based on what I get via cvsup from one of 
the mirrors (not that there has been anything to publish for the past 
couple of months); this introduces the risk of dns and other attacks.

Colin Percival