Facebook is going to ditch support for the SHA-1 cryptographic hash algorithm from 1 October, 2015. The social network made the announcement today stating: These changes are part of a broader shift in how browsers and web sites encrypt traffic to protect the contents of online communications. SHA-1 was one of the most widely used digest algorithms on the Web, but it was determined to be less secure than previously believed by a report from the CA/Browser Forum in 2011 on Baseline Requirements for SSL.