Export (0) Print
Expand All
Expand Minimize

CngKeyUsages Enumeration

Specifies the cryptographic operations that a Cryptography Next Generation (CNG) key may be used with.

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

Namespace:  System.Security.Cryptography
Assembly:  System.Core (in System.Core.dll)

[FlagsAttribute]
public enum CngKeyUsages

Member nameDescription
AllUsagesThe key can be used for all purposes.
DecryptionThe key can be used for encryption and decryption.
KeyAgreementThe key can be used for secret agreement generation and key exchange.
NoneNo usage values are assigned to the key.
SigningThe key can be used for signing and verification.

Not all operations apply to each key. For example, an Elliptic Curve Digital Signature Algorithm (ECDSA) key cannot be used for decryption even if the Decryption usage is set.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Show:
© 2014 Microsoft