Secure Sockets Layer (SSL) encrypts information sent over the internet to protect respondents' privacy. Adding SSL to your survey will keep private information secure.
To activate SSL Encryption on a survey:
Insecure Element Errors.
If, when designing your survey, you use images or other elements that are not hosted on an SSL-enabled server, respondents may see warnings about "Insecure Elements" on the page being blocked when they access an SSL-enabled survey. To fix this issue, either activate SSL on the server that is hosting these elements, or re-host them in your File Library.