MachineKey.Unprotect Method (Byte, String)
.NET Framework (current version)
Unprotects the specified data, which was protected by the Protect method.
System.Web (in System.Web.dll)
public static byte Unprotect(
params string purposes
The ciphertext data to unprotect.
A list of purposes that describe what the data is meant for. This must be the same value that was passed to the Protect method when the data was protected.
The protectedData parameter is null.
The purposes array contains one or more whitespace-only entries.
Possible causes include the following:
The protected data was tampered with.
The value of the purposes parameter is not the same as the value that was specified when the data was protected.
The application is deployed to more than one server and is using auto-generated encryption keys.
For information about this method, see the Protect method.
Return to top
Available since 4.5