ou como espiar todo o tráfego (de uma parte) da internet:
Big Brother on a budget: How Internet surveillance got so cheap
Deep packet inspection, petabyte-scale analytics create a "CCTV for networks."
When Libyan rebels finally wrested control of the country last year
away from its mercurial dictator, they discovered the Qaddafi regime had
received an unusual gift from its allies: foreign firms had supplied
technology that allowed security forces to track nearly all of the online activities
of the country’s 100,000 Internet users. That technology, supplied by a
subsidiary of the French IT firm Bull, used a technique called deep
packet inspection (DPI) to capture e-mails, chat messages, and Web
visits of Libyan citizens.
The fact that the Qaddafi regime was using deep packet inspection
technology wasn’t surprising. Many governments have invested heavily in
packet inspection and related technologies, which allow them to build a
picture of what passes through their networks and what comes in from
beyond their borders. The tools secure networks from attack—and help
keep tabs on citizens.
Narus, a subsidiary of Boeing,
supplies “cyber analytics” to a customer base largely made up of
government agencies and network carriers. Neil Harrington, the company’s
director of product management for cyber analytics, said that his
company’s “enterprise” customers—agencies of the US government and large
telecommunications companies—are ”more interested in what's going on
inside their networks” for security reasons. But some of Narus’ other
customers, like Middle Eastern governments that own their nations’
connections to the global Internet or control the companies that provide
them, “are more interested in what people are doing on Facebook and
Twitter.”
(...)
texto completo no site da ArsTechnica