ZOHO CRM QUESTION

ZOHO CRM QUESTION

Hi All, thank you for your most valuable time.

I would like to use ZOHO CRM as an aggregator of leads online and on mobile phones.  More specifically I would like to create a CRM where the 'leads' enter their own information into the system (opt-in).  

So if I'm at a trade show I can enter leads myself as an Administrator or I can give the 'potential' a way to 'opt-in' on thier own time by visiting a certain url (that only allows them read/write/delete access for their own records).  

How can I make the CRM "leads" have the ability to create, edit and delete their own records without being an Administrator?