Back in March 2014, Matt Cutts, Google’s head of Webspam, said he wanted SSL to be a ranking factor. And Google is now factoring in SSL in SEO rankings. However, currently the affect of installing an SSL Certificate is negligible, therefore we are not advising rushing to install a secure certificate to your site just yet.
The point is that Google understands the importance of security as a ranking indicator for websites. SSL is an important component of web security, but SSL really doesn’t affect how easily a hacker can gain unauthorized access into your website. SSL doesn’t hinder Brute-Force Attacks, nor Code-Injections.
Therefore, we highly recommended first deploying a robust security plan for your site, then add SSL, especially if you have an e-commerce site.