<p>While not strictly necessary for client authentication, most MIT users will want to add the <a href="http://ist.mit.edu/services/certificates/mitca">MIT CA</a> to the list of trusted CAs. You may also want the <a href="http://ca.csail.mit.edu/cacert">CSAIL CA</a> (specifically, the Master CA). On Windows or Mac OS X, downloading the file and opening it should be sufficient. If you've already configured this for Internet Explorer or Safari, respectively, you may skip this step; Chrome uses the system certificate store.</p>
<p>While not strictly necessary for client authentication, most MIT users will want to add the <a href="http://ist.mit.edu/services/certificates/mitca">MIT CA</a> to the list of trusted CAs. You may also want the <a href="http://ca.csail.mit.edu/cacert">CSAIL CA</a> (specifically, the Master CA). On Windows or Mac OS X, downloading the file and opening it should be sufficient. If you've already configured this for Internet Explorer or Safari, respectively, you may skip this step; Chrome uses the system certificate store.</p>