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DSA Class

Represents the abstract base class from which all implementations of the Digital Signature Algorithm (DSA) must inherit.

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

'Declaration
<ComVisibleAttribute(True)> _
Public MustInherit Class DSA
	Inherits AsymmetricAlgorithm
'Usage
Dim instance As DSA

/** @attribute ComVisibleAttribute(true) */ 
public abstract class DSA extends AsymmetricAlgorithm
ComVisibleAttribute(true) 
public abstract class DSA extends AsymmetricAlgorithm

You can use the DSA class and derived classes to create digital signatures that help protect the integrity of your data. The DSACryptoServiceProvider provides an implementation of this class.

To use a public-key system to digitally sign a message, the sender first applies a hash function to the message to create a message digest. The sender then encrypts the message digest with the sender's private key to create the sender's personal signature. Upon receiving the message and signature, the receiver decrypts the signature using the sender's public key to recover the message digest and hashes the message using the same hash algorithm that the sender used. If the message digest that the receiver computes exactly matches the message digest received from the sender, the receiver can assume that the message was not altered while in transit. Note that a signature can be verified by anyone, because the sender's public key is common knowledge.

This algorithm supports key lengths from 512 bits to 1024 bits in increments of 64 bits.

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

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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