last squeeze update?

["Bonno Bloksma (list account)" <b.bloksma@test.tio.nl>]

Hi,

From: Ben Hutchings [mailto:ben@decadent.org.uk] 
[...]
>> the Debian LTS team would like to fix the security issues which are 
>> currently open in the Squeeze version of libssh2:
>> https://security-tracker.debian.org/tracker/CVE-2016-0787
>>[...]
>
> I already fixed both libssh and libssh2 as I had advance notice under embargo.
>
> Ben.

So, is that the last update the squeeze-lts project gets? When I do an apt-get update on my old Squeeze system I now get a warning about the GPG key:
W: GPG error: http://http.debian.net squeeze-lts Release: The following signatures were invalid: BADSIG 8B48AD6246925553 Debian Archive Automatic Signing Key (7.0/wheezy) <ftpmaster@debian.org>

I still get the libssh2-1 update but I get this warning as well.

Bonno Bloksma