From CNET: Three and a half years ago, Google predicted that the day would come when Chrome would warn us all of the security risks of using the web's seminal HTTP technology to deliver web pages to your browser.
That day is today.
Google's newest web browser version, Chrome 68, gives new prominence to a broad effort to curtail surveillance, tampering and security risks on the web by showing a "not secure" warning for any HTTP website. Instead, Google wants website operators to use HTTPS, which adds encryption to the connection between your browser and the computer hosting a website.
HTTPS blocks a number of problems, like injecting ads, getting your browser to run software to mine someone else's cryptocurrency or sending you to fake websites used to steal your passwords. For details, check CNET's FAQ on Chrome's "not secure" warning for HTTP websites.
The "not secure" warning doesn't indicate that you've been hacked -- just that you're not as protected if someone tries to do so.
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