yes, the repository is the debian multimedia project, here are the lines from my sources.list:
deb-src http://www.debian-multimedia.org/ sid main deb http://www.debian-multimedia.org/ sid main and their key is in my list: /etc/apt/trusted.gpg -------------------- pub 1024R/1DB114E0 2004-01-15 [expired: 2005-01-27] uid Debian Archive Automatic Signing Key (2004) <[EMAIL PROTECTED]> pub 1024D/4F368D5D 2005-01-31 [expired: 2006-01-31] uid Debian Archive Automatic Signing Key (2005) <[EMAIL PROTECTED]> pub 1024D/1F41B907 1999-10-03 uid Christian Marillat <[EMAIL PROTECTED]> uid Christian Marillat <[EMAIL PROTECTED]> sub 1536g/C28DCC42 1999-10-03 sub 1024D/5D3877A7 2002-08-26 pub 1024D/2D230C5F 2006-01-03 [expired: 2007-02-07] uid Debian Archive Automatic Signing Key (2006) <[EMAIL PROTECTED]> pub 1024D/6070D3A1 2006-11-20 [expires: 2009-07-01] uid Debian Archive Automatic Signing Key (4.0/etch) <[EMAIL PROTECTED]> pub 1024D/529B8BDA 2003-12-18 uid Blackdown Java-Linux Package Signing Key <[EMAIL PROTECTED]> sub 2048g/2C2BB3B9 2003-12-18 pub 1024D/2F6BCD59 2001-10-20 uid Ian Campbell <[EMAIL PROTECTED]> sub 1024g/AB9E8172 2001-10-20 pub 1024D/D66B746E 2004-09-21 uid Skype Technologies S.A. <[EMAIL PROTECTED]> sub 1024g/FCC6A0AB 2004-09-21 On 5/20/07, Martin Michlmayr <[EMAIL PROTECTED]> wrote:
* Brian Minton <[EMAIL PROTECTED]> [2007-05-20 03:49]: > Package: libguicast > Version: 1:2.1.0-2svn20070221 > > When I try to install libguicast, I get the following error: > WARNING: The following packages cannot be authenticated! > libguicast > Install these packages without verification [y/N]? This package doesn't appear to be in the Debian archive, so you probably added another APT repository to /etc/apt/sources.list and didn't add th GPG key of that repository. Can you check /etc/apt/sources.list? -- Martin Michlmayr http://www.cyrius.com/

