SHA-1 Algorithm and Decryption in CF

Hello there,

I am trying to decrypt a string and I get the following error message:

"The SHA1 algorithm is not supported by the Security Provider you have chosen."

This is a small description of the system:

OS: Windows Server 2003

CF Version: 8, STANDARD

Web Server: IIS

I have successfully worked with encryption/decryption in the past, but on Enterprise versions of CF. I am wondering if the fact that CF is standard has to do with the problem.

Thanks,