Anonymous - 2011-05-22

Looks like this could be the issue:
http://support.microsoft.com/kb/811833

"...
Microsoft .NET Framework applications such as Microsoft ASP.NET only allow for using algorithm implementations that are certified by NIST to be FIPS 140 compliant. Specifically, the only cryptographic algorithm classes that can be instantiated are those that implement FIPS-compliant algorithms. The names of these classes end in "CryptoServiceProvider" or "Cng". Any attempt to create an instance of other cryptographic algorithm classes, such as classes with names ending in "Managed", cause an InvalidOperationException exception to occur. Additionally, any attempt to create an instance of a cryptographic algorithm that is not FIPS compliant, such as MD5, also causes an InvalidOperationException exception.
..."

 

Last edit: Anonymous 2013-11-16