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KeyInfoRetrievalMethod Class

References KeyInfo objects stored at a different location when using XMLDSIG or XML encryption.

Namespace: System.Security.Cryptography.Xml
Assembly: System.Security (in

public class KeyInfoRetrievalMethod : KeyInfoClause
public class KeyInfoRetrievalMethod extends KeyInfoClause
public class KeyInfoRetrievalMethod extends KeyInfoClause
Not applicable.

The KeyInfoRetrievalMethod class represents the <RetrievalMethod> element for both XML encryption and XML digital signatures.

Use the KeyInfoRetrievalMethod class to reference the same KeyInfo information in multiple XMLDSIG signatures or encrypted XML documents, especially when the referenced information is large. For example, a <RetrievalMethod> subelement can be used to reference a KeyInfoX509Data object that contains an X.509v3 certificate chain, which validates the signing key.

For more information about the <RetrievalMethod> element, see Section 4.4.3 of the XMLDSIG specification, which is available from the World Wide Web Consortium (W3C) at, or see the XML Encryption specification, which is available from the W3C at


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 Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0