Any website which conducts business over the internet and has e-commerce transactions should use SSL (Secure Socket Layer). It is the standard way to secure transactions by encrypting data and providing authentication over the web. SSL prevents hackers from accessing personal information, prevents eavesdropping and tampering of information.

All major web browsers have some built-in security capabilities, but if you have a website your server also needs security. That security is provided through an SSL certificate from a certificate authority such as VeriSign or Geotrust.