Thanks for your comments zacharye. BTW, you wouldn't believe how long I spent coming up with that name ;)
All the forms can use SSL, so the submission of data is secure. On form completion, the data is stored in our database for creating the PDF and to save multi-page forms. If the template owner has not opted to store the entry, this data is deleted after 2 days. If they opt to store the entry, it will stay in the system until deleted by them. If they delete it, the data is removed completely, leaving only stats on when it was downloaded, IP address of downloader etc
Access to stored entries is only available to the template owners account through an entries search facility. All this is behind SSL too.
I should elaborate on this more in the TOS, but is that what you wanted to know?