Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
CngKeyUsages Enumeration
Collapse the table of content
Expand the table of content

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
Show:
© 2015 Microsoft