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Receiving "authenticode signature not found" Error When Accessing ActiveX Applications with Microsoft Internet Explorer

Primary Software: Measurement Studio>>Visual Basic Support
Primary Software Version: 8.0
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
I created an ActiveX application with Measurement Studio components that is embedded into a web page. However, when I open the web page with Internet Explorer, I receive an error saying "authenticode signature not found". Why does this happen and how can I fix it?

Solution:
Authenticode is a security feature of Internet Explorer that allows vendors of downloadable executable code (plug-ins or ActiveX controls, for example) to attach digital certificates to their products to assure end users that the code is from the original developer and has not been altered. This security feature lets end users decide for themselves whether to accept or reject software components posted on the Internet before downloading begins.

The error message "authenticode signature not found" will appear (depending on internet settings) when a file doesn't have a authenticode signature. Therefore the web browser isn't sure if it can trust this file and thus asks the user what to do. You can fix this problem by setting up the correct Internet permissions as described below.
  1. Open Internet Explorer and select Tools » Internet Options....
  2. Select the "Security" tab and click on the Trusted Sites icon.
  3. Click on the Sites... button to add the URL containing your ActiveX application to trusted sites. After adding your site, click OK.
  4. In the "Advanced" tab, select the following option "Allow software to run or install even if the signature is invalid".
  5. Click OK which will save your Internet settings.


Related Links:
KnowledgeBase 252I1S5I: Web Browsers with Medium Security Settings are not Able to View Measurement Studio Unsigned ActiveX Controls

Attachments:





Report Date: 01/16/2006
Last Updated: 09/08/2006
Document ID: 3TFAIPO8

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