What certificate do I need for code signing?

I'm trying to sign a ClickOnce .NET Application. I have a SSL cert that I use on a website, but 开发者_如何学编程I'm thinking that it is not up to the job. When I select the cert in Visual Studio I get an messsage box saying 'The selected certificate is not valid for code signing. Choose another certificate file'. The cert details look like this:

whereas a temporary cert generated in VS looks like this:

It seems to have a lot more going for it in terms of looks and general charisma. Do I need to get a new cert issued? What would I need to specify when ordering it to ensure it is up to the job of signing the ClickOnce code?

Certificates that you buy usually have a single purpose. There are several companies out there that provide code signing certificates (I bought one from GoDaddy! a few years ago).

The Adsense results on a single Google search should be enough to get you going:

http://www.google.com/search?q=code+signing

This company http://www.instantssl.com/code-signing/ is the cheapest place I found for code signing certs. I had no problem going through the purchasing process.