Is Google "Not Provided" only affect non-SSL website?

Is Google "Not Provided" only affect non-SSL website? - Google Search Console is a free application that allows you to identify, troubleshoot, and resolve any issues that Google may encounter as it crawls and attempts to index your website in search results. If you’re not the most technical person in the world, some of the errors you’re likely to encounter there may leave you scratching your head. We wanted to make it a bit easier, so we put together this handy set of tips about google-search, search-engines, https, to guide you along the way. Read the discuss below, we share some tips to fix the issue about Is Google "Not Provided" only affect non-SSL website?.Problem :

Based on this blog post,

Google Analytics may not be providing keyword referral data anymore

Google not provide their search keyword to insecure website. Since the keyword is Not provided, looks like Google intentionally replace the keyword with word Not provided.

But is this long-standing 4 years problem only affect non-SSL website?

Solution :

It's not quite a case of Google choosing to replace the keyword with Not Provided. The issue here is that Google runs all of Google search using HTTPS. A safety restriction built into all browsers is not to provide the referrer header when the referrer is a HTTPS site, this is an intentional security feature. The way most libraries have worked in the past to get the keywords used for the Google search that brought the user to the site in question was to get the data out of the referrer header which had the Google SERP URL that the user came from and which contained the search string and keywords. As this is no longer happening due to the HTTPS restriction there is no data provided hence the Not Provided result if you try to get the referrer keyword.

If the issue about google-search, search-engines, https, is resolved, there’s a good chance that your content will get indexed and you’ll start to show up in Google search results. This means a greater chance to drive organic search traffic to your site.