Google is moving most of its ad-serving and ad-buying platforms to HTTPS. The changes are a part of the company s efforts to encrypt as much content and services as possible. Google also is planning to make a similar change for advertisers buying ads through Google. By June 30, 2015, the vast majority of mobile, video, and desktop display ads served to the Google Display Network, AdMob, and DoubleClick publishers will be encrypted, Google says. The change is part of a call to action from the Interactive Advertising Bureau to adopt HTTPS ads.
Source: https://threatpost.com/google-moving-toward-encrypted-ad-services/112320/