Internet Filtering Worldwide

The Technologies of Filtering and
Their Unanticipated Consequences

Agenda

“Who”: Country-based filtering

“What”: Typical targets of filtering

What China targets for blocking

“How”: Filtering technologies

DNS Redirection Example (China)

DNS Redirection Example (China)

Granularity

Granularity of blocking

Granularity of blocking

The effect of technical happenstance on filtering granularity

The effect of technical happenstance on filtering granularity

Selected filtering “mistakes” (China)

Transparency

Transparency of the block list

Approaches to transparency

Approaches to transparency

The effect of technical happenstance on filtering transparency

The effect of technical happenstance on filtering transparency

Internet Filtering Worldwide

The Technologies of Filtering and
Their Unanticipated Consequences

Research, articles, listings of specific blocked sites:
http://cyber.law.harvard.edu/filtering

Influence of Code and Companies on Freedom of the Media and the Internet

Influence of Code & Companies on Freedom of Media and Internet

Commercial filtering software

Search engine filtering

Slide 26

Archive.org exclusions

Domain names

Slide 29

“Adware”: Online advertising display

Influence of Code and Companies on Freedom of the Media and the Internet