Security Measures for Jotform?

I am creating a Job Application Form for a client using Jotform. They are wanting to collect some sensitive personal information like Driver's License Numbers, etc. My questions are:

(1) Is the information submitted through Jotform "secure"?

(2) If I add this Jotform Application to their website, is there any need for them to add SSL certificate to their website or does that even come into play with a Jotform?

Thanks for your response!