In October 2017, Google will begin phase two of its plan to label all HTTP pages as non-secure. Beginning in October, Chrome will label HTTP pages as insecure if users can input any data. Google highlights this will apply to any page with a search box. Time to switch to HTTPS! Read the full article on ZDNet.com
Here’s how to fix this problem:
Migrate to HTTPS. To prevent the “Not Secure” notification from appearing when Chrome users visit your site, only collect user input data on pages served using HTTPS. Read about HTTPS.