HTTPS (Hypertext Transfer Protocol Secure) is an internet communication protocol that protects the integrity and confidentiality of your users' data between the user's computer and the site. For example, when a user enters data into a form on your site in order to subscribe to updates or purchase a product, HTTPS protects that user's personal information between the user and the site. Learn more about HTTPS.
To enable HTTPS for your Blogger blog follow the steps given below:
1. Sign in to your Blogger account.
2. Select the blog (clicking on the name of your blog) to enable HTTPS support.
3. Now go to "Settings" > "Basic" > "HTTPS Settings".
4. In "HTTPS Availability", select "Yes".
When you enable HTTPS, your blog will become accessible over both HTTP and HTTPS connections.
Visitors can view your blog over an encrypted connection by visiting https://YOURBLOG.blogspot.com.
Note: HTTPS will not be available for blogs with a custom domain. (Currently, HTTPS is only supported for Blogspot domain blogs.)
To disable HTTPS, follow the 1, 2 and 3 steps again and select "No" for HTTPS Availability. If you disable HTTPS, visitors will be redirected to the unencrypted HTTP version of your blog.
Read more about HTTPS support coming to Blogspot