setting up SSL in peoplesoft applications

 Hi ,

I am in process of implementing SSL for a PeopleSoft application and had some confusion about this. appreciate if someone can reply and clarify those --

** Without implementing SSL, if i use https://ip:port ...  for my application giving the https port i am able to login to the application. It just produces a certificate error on browser. So is this SSL ? and are communications between browser and web server encrypted ?? if so, is implementing SSL all about mitigating the certificate error ?

** Do i necessarily have to have an authentication token domain before setting up SSL ?

** Can someone put the concept as to how public private key is used in peopesoft PIA ?  i mean how secure communication takes place .. pelase give reference of any documents which explains in relation to weblogic in peoplesoft .