摘要：Social networking sites (SNS) have
emerged as a new breed of Web 2.0
websites. The sites are focused on user
created content (UCC), having been
designed so user profi les are integrated
into the community development. These
social sites are catered to friend-of-afriend
(FOAF) angles and individuals
and groups are connected directly with
others who share common interests, as
users upload and share photos, videos,
and ideas (in exchange for joining, as
with sites such as Flickr and YouTube).
As SNS becomes more popular, with
increased exposure to personal data,
the information becomes a goldmine for
marketing and advertising companies,
and political interest groups. Users are
more likely to fi nd value service with a
social component.
