how to use cryptography providers(flexicore) in web-server, i.e.Tomcat ?

in my application, i am sending public key to server, that is tomcat server. and i am using URLConnection class, which is used to send file from client to server. it is working fine.

After that in response server will send public key again to client. but that is not sending. and that is giving error of providers.

i am using flexicore provider , i also add explictily that provider using Security.addProvider , in program but that is not worikng.

so, pls anybody tell me how providers will be support in tomcat
server application.

pls, help me.