Self signing certificate is working in W2012.
Create a DWORD EnableSelfSignedCertificates=1 unter HKLM\Software\Microsoft\Update Services\Server\Setup\
The blog post from WSUS Product Team Blog: http://blogs.technet.com/b/wsus/archive/2013/08/15/wsus-no-longer-issues-self-signed-certificates.aspx
Create a DWORD EnableSelfSignedCertificates=1 unter HKLM\Software\Microsoft\Update Services\Server\Setup\
The blog post from WSUS Product Team Blog: http://blogs.technet.com/b/wsus/archive/2013/08/15/wsus-no-longer-issues-self-signed-certificates.aspx