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    <p>I'm assuming your question is this: can you force IE to prompt the user to install a (previously unknown) certificate, in order to enable an otherwise signed and safe ActiveX control to be run on a page? (If this isn't your question, comment and I can revise.)</p> <p><strong>Short answer: no.</strong> You'll need to shell out $$$ for code-signing cert from a trusted authority. (which is, AFAIK, different from a regular SSL cert)</p> <p><strong>Long answer:</strong></p> <p>From a security perspective, being signed with an unknown certificate is similar to being unsigned, because there's no trusted authority telling the client he can trust that code. And IE's default settings are not to allow unsigned ActiveX controls to be downloaded and used. </p> <p>If what you're trying to do were allowed, then a savvy attacker could simply create a cert, sign it, and thereby make it easier for users to run their attack code.</p> <p>There are certainly workarounds, but all involve clients taking action to change their IE settings, or (in an intranet setting) having administrators push out changes to client settings.</p> <p>Here's some more info on this from TechNet (<a href="http://technet.microsoft.com/en-us/library/cc505863.aspx" rel="nofollow noreferrer">http://technet.microsoft.com/en-us/library/cc505863.aspx</a>): </p> <blockquote> <p>Internet Explorer is not configured to trust the certificate authority Anyone, including attackers, can create their own CA and issue certificates. Therefore, Internet Explorer does not trust all CAs by default. Instead, Internet Explorer trusts only a handful of public CAs. If the certificate was issued by an untrusted CA and the website is on the public Internet, the server administrator should acquire a certificate from a trusted CA. If the website is on your intranet, a client administrator should configure Internet Explorer to trust the issuing CA.</p> </blockquote>
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