The users sign with their email addresses. No personal details or passwords are requested or collected so as to ensure the optimal users' anonymity. The authentication is delegated to the Facebook or the user's preferred email provider, which requests the user's password.
If a user opts for the sign in with an email address, the authentication is accomplished by opening the personal inbox and clicking the received authentication link. The authenticated users can access only their own private data.
The private data is anonymous, encrypted and cannot be disclosed to third parties. However, the users are urged not to use the free food diary for storing any sensitive private information. We do our best to protect the accumulating data. Considering that this service is totally free and nonprofit, any responsibility for data leaks or losses will be declined.
Importantly, if you stumble upon an issue or even if you do not like something, please report it so that it can be rapidly fixed.