Client Certificates

Question

Hi I am developing the security application. In ths application i have to use client certificate and ssl for security. I have configure the ssl. Now i have one form from which user can login into the application. When user gives the user name and password then the request is send to the another page. On this page i want to get information about the client certificates. I any one have idea about it please tell me about it. Mail me on [email protected] Thanks in advance...