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


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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 override ICryptoTransform CreateDecryptor(
	byte[] rgbKey,
	byte[] rgbIV


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.

Exception Condition

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
Available since 1.1
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