Any pages which are used to capture personal data - via a Form, for example - should be encrypted via an SSL certificate. To enable encryption of pages go to:
- Content -> Pages -> Options -> Setup
- Content -> Assets -> Options -> Setup
- Setup -> Site
- System -> Configuration
Select System, and then Pages -> Security:
1.Edit/configure:
Enable security
Check to allow encryption to be applied to pages.
Note: to control how encryption is applied go to Force SSL.