In an attempt to influence greater security on the internet, Google announced earlier this month via its Webmaster Central Blog that encrypted sites will rank slightly higher in organic search, with all other things being equal.
Specifically, Google said:
…we’re starting to use HTTPS as a ranking signal. For now it’s only a very lightweight signal — affecting fewer than 1 percent of global queries, and carrying less weight than other signals such as high-quality content — while we give webmasters time to switch to HTTPS. But over time, we may decide to strengthen it, because we’d like to encourage all website owners to switch from HTTP to HTTPS to keep everyone safe on the web.
We think it’s important to note that Google practices what it preaches. All of its sites and applications employ HTTPS (also known as HTTP over TLS, or Transport Layer Security).
The initial and ongoing costs to secure a site are minimal given the peace of mind and user confidence it delivers.