Facebook announces new security measures less than 24 hours after Mark Zuckerberg’s Facebook page was defaced by a hacker. New security measures include wider use of HTTPS and the introduction of “social authentication” The move is tied to Friday’s “Data Privacy Day” Facebook has remained mum on the apparent hacking incident that saw someone insert a message onto Zuckerberg’s fan page. The message read: “Let the hacking begin: If facebook needs money, instead of going to the banks, why doesn’t Facebook let its users invest in Facebook in a social way?””]