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.
public enum CngKeyUsages
|None||No usage values are assigned to the key.|
|Decryption||The key can be used for encryption and decryption.|
|Signing||The key can be used for signing and verification.|
|KeyAgreement||The key can be used for secret agreement generation and key exchange.|
|AllUsages||The key can be used for all purposes.|
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.
Supported in: 4, 3.5
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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