title: SSL Certificate
body: <p>I am building a buy-system and i was told to set up an SSL certificate on my web-server to work with bank operations. </p>
  
  <p>I am new to this and i don't exactly understand the difference between OpenSSL (which is free and opensourced) and SSL certificates, that are needed to be bought (thawte.com). </p>
  
  <p>I guess OpenSSL is smth like tool to create a keys (ive alredy done this for firstdata.com), but if i buy ssl certificate on thawte.com and install it ill have my web-site running over https?</p>
  
  <p>Can i use free openSSL to work with banks? Or i have to buy one?</p>