Exception type: CryptographicException Exception message: Object already exists.


 I had a  application hosted in IIS. On trying to browse the site, I got the following exception in the Event Viewer:

Exception type: CryptographicException Exception message: Object already exists.

 

This happens because the program is running with different users; One with normal user and another with startup user.

When the key is created, its permission is only granted to the creator.

Solution:

Step 1. In IIS, change the Identity of the application pool under which the website is running. The identity will be your user credentials.

Step 2. Do IISRESET

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