root@rjhigh5:/var/lib/apt# apt-get update
Get:1 http://security.ubuntu.com precise-security Release.gpg [3,663 B]
Get:2 http://us.archive.ubuntu.com precise Release.gpg [3,657 B]
Get:3 http://us.archive.ubuntu.com precise-updates Release.gpg [3,665 B]
Get:4 http://us.archive.ubuntu.com precise-backports Release.gpg [3,667 B]
Get:5 http://security.ubuntu.com precise-security Release [3,659 B]
Ign http://security.ubuntu.com precise-security Release
E: GPG error: http://security.ubuntu.com precise-security Release: The following signatures were invalid: NODATA 1 NODATA 2