Google’s Chrome browser Chrome will begin labeling HTTP sites that transmit passwords or ask for credit card details as “Not secure” in January of 2017. The change will take effect with the release of Chrome in January 2017 and affect certain unsecured web pages that feature entry fields for sensitive data, like passwords and payment card numbers. Unencrypted HTTP has been considered dangerous particularly for login pages and payment forms, as it could allow a man-in-the-middle attacker to intercept passwords, login session, cookies and credit card data.
Source: https://thehackernews.com/2016/09/chrome-https-security.html