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DESCryptoServiceProvider.CreateDecryptor Method (Byte(), Byte())

Creates a symmetric Data Encryption Standard (DES) decryptor object with the specified key (Key) and initialization vector (IV).

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

Public Overrides Function CreateDecryptor ( _
	rgbKey As Byte(), _
	rgbIV As Byte() _
) As ICryptoTransform


Type: System.Byte()

The secret key to use for the symmetric algorithm.

Type: System.Byte()

The initialization vector to use for the symmetric algorithm.

Return Value

Type: System.Security.Cryptography.ICryptoTransform
A symmetric DES decryptor object.


The value of the Mode property is OFB.


The value of the Mode property is CFB and the value of the FeedbackSize property is not 8.


An invalid key size was used.


The algorithm key size was not available.

This method decrypts an encrypted message that was created using the CreateEncryptor overload with the same parameters.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.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.

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