FIX: Error message in FIPS-compliant systems when you use Windows Communication Foundation to serialize generic types: "This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms"


In Federal Information Processing Standard (FIPS)-compliant systems, you receive the following error message when you use Microsoft Windows Communication Foundation (WCF) to serialize generic types:
System.InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.


This problem occurs because the MD5 algorithm is not FIPS compliant. The MD5 algorithm uses Windows Communication Foundation to obtain a hash value. The hash value generates a unique name for a data contract.


Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

To download this hotfix from the MSDN Code Gallery, visit the following Microsoft Web site:

Note The MSDN Code Gallery displays the languages for which the hotfix is available. If you do not see your language listed, it is because the Code Gallery resource page is not available for that language.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:


You must have the .NET Framework 3.0 installed to apply this hotfix.

Restart requirement

You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
File nameFile versionFile sizeDateTimePlatform


To work around this problem, use one of the following methods.

Method 1

Provide unique names for the data contracts.

You can use this method when the generic types that you must serialize must be used as the generic parameters.

Method 2

Create a subclass of the ReadOnlyCollection<T> class. When you use instances of the subclass, use the CollectionDataContract attribute to handle the namespace hash value issues. For example, use the following code.

class MomReadOnlyCollection<T> : ReadOnlyCollection<T> { }


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

More Information

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

文書番号:935434 - 最終更新日: 2016/12/21 - リビジョン: 1