This app is a real working login system.
It includes registration with activation link, resending activation link functionality, activation of account through validation of registered e-mail, login (once legitimately registered), forgotten password functionality and a member's page (only accessible once securely logged in).
The data is stored in a mySQL database. Sensitive data is encrypted.
"Recaptcha" and other security coding (e.g. maximum number of login attempts in a given period) prevents brute-force attacks and bot spam registrations.