As tntcoder says, the secure socket layer is for the transfer of data securely. That's why when I pass my credit card details etc across the net I don't want other people spying on that data. But it doesn't stop it being unencrypted when it arrives.
You need to look into encryption of the data prior to entering into into your DB. Also, how to clean and calm the data. You don't want people submitting malicious code, give SQL injection and salting a Google and it should set you on the path for securing your forms.