For several weeks below is the warning I receive when I do apt-get update.
Get:1 http://security.debian.org squeeze/updates Release.gpg [836 B]Ign
http://security.debian.org/ squeeze/updates/main Translation-enIgn
http://security.debian.org/ squeeze/updates/main Translation-en_USHit
http://security.debian.org squeeze/updates ReleaseIgn
http://security.debian.org squeeze/updates ReleaseIgn
http://security.debian.org squeeze/updates/main i386 Packages/DiffIndexHit
http://security.debian.org squeeze/updates/main i386 PackagesFetched 836 B in
0s (1,201 B/s)Reading package lists... DoneW: GPG error:
http://security.debian.org squeeze/updates Release: The following signatures
were invalid: BADSIG AED4B06F473041FA Debian Archive Automatic Signing Key
(6.0/squeeze) <ftpmas...@debian.org>
What is the problem with the debian repositories?