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MachineKey Class

Provides a way to encrypt or hash data (or both) by using the same algorithms and key values that are used for ASP.NET forms authentication and view state.

System.Object
  System.Web.Security.MachineKey

Namespace:  System.Web.Security
Assembly:  System.Web (in System.Web.dll)

public static class MachineKey

The MachineKey type exposes the following members.

  NameDescription
Public methodStatic memberDecode Obsolete. Decodes and/or validates data that has been encrypted or provided with a hash-based message authentication code (HMAC).
Public methodStatic memberEncode Obsolete. Encrypts data and/or appends a hash-based message authentication code (HMAC).
Public methodStatic memberProtectProtects the specified data by encrypting or signing it.
Public methodStatic memberUnprotectUnprotects the specified data, which was protected by the Protect method.
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ExceptionCondition
ArgumentNullException

The data to encrypt, hash, decrypt, or validate does not exist

The MachineKey class provides methods that expose the hashing and encryption logic that ASP.NET provides. For information about which encryption and hashing algorithms ASP.NET uses, and the key values that it uses with them, see machineKey Element (ASP.NET Settings Schema).

Caution noteCaution

The MachineKey APIs should only be used in an ASP.NET app. Behavior of the MachineKey APIs outside the context of an ASP.NET application is undefined

.NET Framework

Supported in: 4.5, 4

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.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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