After you have built your Other Card, you should get a digital signature for your component to provide accountability to users downloading from your Web site. Supported in Microsoft® Internet Explorer version 3.0, Authenticode™ is Microsoft's implementation of its code-signing proposal to the W3C. Authenticode uses documented Win32® functionality available to any Microsoft® Windows® 95–based or Microsoft® Windows NT®–based application, and works with Java applets, plug-ins, and ActiveX™ controls to provide accountability for these types of software components. Through Authenticode, end users know who published a piece of software and whether the software has been tampered with, before downloading the software to their PC.
Note that Netscape Navigator 3.0 does not support Authenticode or any code-signing technology. As such, Navigator does not recognize and alert users to unsigned plug-ins or other unsigned executable files.