Digital certificates

Hi,

In mywebsite,written inasp.net, i need to signa PDF witha digital certificate (certificatethat digitallyidentifies a personto hiscountry  -digital equivalent to aphysicalidentitycard) installed in the client browser of the person whomake therequestto the website.

Theproblem is I cannot accessthe certificate list of the browser with ASP .NET.

I tried the following sentence,butjust bringmethecertificatesinstalledon the server:

Dim objStore AsNew X509Store(StoreName.My, StoreLocation.CurrentUser)

Afterfurther research, I have seenthat there is anotherorderis as follows:

Dim cert As HttpClientCertificate = Request.ClientCertificate

And this:

ForEach strKey In Request.ClientCertificate
     Response.Write(strKey &" = "& Request.ClientCertificate(strKey)&"<BR>")Next

However, no it returnsme anything.

It seemsthat for theselast instructionswork,you must configureboth the server andthe browserto beable toreceive and sendcertificates.

Can anyonetell mehow to do this?