Recently we started getting the following error message on our ASP.NET 2.0 web application running on IIS6. Exception type: CryptographicException Exception message: Padding is invalid and cannot be removed. Stack trace: at System.Security.Cryptography.RijndaelManagedTransform.DecryptData(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount, Byte[]& outputBuffer, … Continue reading