A week ago, we reported that HTTPS sites can't work with the Google Trusted Store program because the badge is not HTTPS enabled.
Well, that changed a few days ago. The Google Trusted Stores Team emailed their stores on October 24th that they now have new instructions available for implementing the badge on HTTPS sites. The email read:
We’d like to share with you that we have made some changes to enable stores to display the Google Trusted Stores badge on HTTPS pages. The JavaScript must be updated in order to enable the badge to display on HTTPS pages. Without this update, the badge will remain suppressed on HTTPS pages.
The instructions are currently available in this open Google doc page and Brian Shockley, the Owner of ShopBakersNook.com went live with it just days ago. He is full on HTTPS and the badge shows perfectly on his site:
So it is now safe for Google Trusted Stores to switch over to HTTPS and still show their badges.
Forum discussion continued at Google AdWords Help.