An internet pioneer is doubtful Mark Zuckerberg can refocus Facebook on privacy. Here's why. (FB)

Internet pioneer Paul Vixie is dubious about Facebook CEO Mark Zuckerberg's plan to create a "privacy focused" social networking platform.
Vixie, the CEO of Farsight securities, has worked on privacy and security issues for decades.
The concepts of "private" and "social" are fundamentally at odds, and no one yet has figured out a way to blend the two, he said.
Facebook may be feeling constrained by Europe's new privacy law, which illustrates how difficult it can be to promote both privacy and a