• If My WCF service have big number of clients through the Internet,then whether should all of them share the same Client Certificate(X509)?

  • And if their certificates should be unique , what should I do on the WCF to identify all the certificates?

  • Last question: Must I import the server-side certificate into TrustedPeople location on every Client ? (Which seems to be troublesome and any way convenient? )

1 Answer 1


I am assuming a WCF service hosted on IIS using HTTPS with client certificate.

  • This depends on your requirements. If you want to use the client cert to identify any valid client for your service then no. If you want to authorise each client individually then yes. Is your client for B2B scenario then you may have to use individual certificate for each client.
  • If hosting on IIS as long as the client cert is installed in Trusted People it should just work. For self hosting a custom certificate validator class can be implemented to do thus
  • This is not required if the cet is issued by a trusted certification authority e.g. Verisign. Otherwise I think you can use a Base64 encoded value of the cert in endpoint identity element as shown here http://msdn.microsoft.com/en-us/library/ms733130(v=vs.110).aspx
  • Thnaks,save me a day. Jul 27, 2014 at 13:06

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