Google has sent out a warning that HTTP sites that contain forms and other input fields will be marked Not Secure staring this October.
The search giant gave a notice of this a few months ago but has now takes the next step to formally notify those who will be affected with the upcoming change.
The notification states: “Beginning in October 2017, Chrome will show the ‘Not secure’ warning in two additional situations: when users enter data on an HTTP page, and on all HTTP pages visited in Incognito mode.”
The original Google Chrome post can be found here: https://blog.chromium.org/2017/04/next-steps-toward-more-connection.html