web site needs certificate

Hello everyone,

I am developing an Http client which could collect data from external web sites. Currently, I want to test with the web sites which needs certificate to access (either needs client to accept its certificate or needs client to provide client's certificate).

I am suffering from finding a number of such web sites, could anyone provide some such types of web sites please?

(most web site I investigated are using ActiveX control to provide secure access, not using certificate)

thanks in advance,
George