CngKeyOpenOptions CngKeyOpenOptions CngKeyOpenOptions CngKeyOpenOptions Enum


Specifies options for opening a key.

This enumeration has a FlagsAttribute attribute that allows a bitwise combination of its member values.

public enum class CngKeyOpenOptions
public enum CngKeyOpenOptions
type CngKeyOpenOptions = 
Public Enum CngKeyOpenOptions


MachineKey MachineKey MachineKey MachineKey 32

A machine-wide key is opened.

None None None None 0

No key open options are specified.

Silent Silent Silent Silent 64

UI prompting is suppressed.

UserKey UserKey UserKey UserKey 0

If the MachineKey value is not specified, a user key is opened instead.


The Silent option suppresses any UI prompting. This option may not work with some key types, such as smart card keys and keys that are stored in the software key storage provider (KSP). These key types are protected with mandatory UI prompting.

Applies to