Encryption help

Hello, I’m really a newbie at all this stuff and need some help.

I’m using Contact Form 7 and want clients to be able to send their info to me securely. Is there a way to encrypt the form? (I don’t even know of that’s the proper term…) Is there a plugin I should use or something?

Thanks in advance!

http://wordpress.org/extend/plugins/contact-form-7/