Trouble Installing .NET 2.0….

If you had a Beta version of Framework 2.0 installed on your machine and are moving to a the RTM version, then you might have some trouble with getting the correct version of mscoree.dll in place. The reason is Microsoft Installer’s resilence feature will restore the old version of mscoree.dll in your system directory even…

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Daylight savings changes and WCF Security Processing

I had a question today from a customer who was concerned that his WCF application might start to behave erratically due to the new Daylight savings schedule. Then I realized that there has been quite some noise around this area and people are predicting systems to stop responding when the new Daylight savings goes into…

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WS-Federation Passive

I have discussed about Federation before. This post discusses Federation from the active context. “Active” means that the client is a smart client capable of doing encryption and signing and can actively participate in the Federation protocol. There are cases where the client is simply a Web Browser that is not capable of creating a secure…

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Asymmetric tokens and Mixed-Mode Security

When you are using a X.509 Certificate as the client authentication token in Mixed-Mode Security – apart from signing the Timestamp WCF will sign the ‘To’ header as well. This is to prevent a client spoofing attack by a rougue service. Consider the situation where the client does not sign the ‘To’ header and sends the…

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WCF Security Modes

WCF supports three types of Security. They are, Transport Security Mixed-Mode Security Message Security Let’s discuss the various Security Modes below.  Transport Security is applied at the transport byte stream below the message layer. The message does not have a Security header and the message does not carry any user authentication data. It is the…

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