Can anyone advise me some site's or documents about https???

I want my statistics on my website only to be reached by https but dont know how.

Going through the hassle of installing a HTTPS server just for the sake to keep your statistics more secure? Well first of all you need a valid HTTPS certificate ... is it really worth the money ?

money?
It should be possible without any money, right???

Yes, it's definitely possible without spending any money on a cert. You can generate a self signed cert using OpenSSL, and you can setup https service using mod_ssl with Apache.

Well this is no real HTTPS then since the certificate is not 100% valid is it? Doesn't certificates have special authorities they need to be signed with ?

The concept behind https is encryption of data to provide a secure link to send data down - the certificate is to verify that you are connecting to who you think you are - for example a bank:

The bank runs https and a webserver for an online banking service.
Your unscrupulous friend sets up a duplicate site and server on his machine to try to get your bank details then redirects your request to his machine

How do you validate which server you are connecting to - answer the bank will have a security certificate in its name and it will be signed - your friends will not have this so you can identify the rouge site.

For my final year uni project i have set up an SSL server using Apache modules - I use a self signed certificate for that it runs without errors and provides the security of ssl for my members areas etc which is a requirement of my project spoecification...