Many privacy-protection Web sites work by inserting themselves as (1) and masking the Internet addresses of users’ computers. If a user in a country with (2) goes to a privacy-protection site, that site becomes a shell that can be used to explore the Web. If the user types in the address of (3) , the government will see the user’s destination as the privacy-protection site that is the intermediary. So while a user (4) at the Safe Web site, for example, the site has an embedded frame that gives (5) .
But when governments are alerted, they can (6) the privacy-protection sites. In March, for example, (7) a number of such sites, including Safe Web.
Anonymizer combats such controls by changing (8) and cycling through domain every few months. (Its users (9) telling them the new names and addresses. )
"The names are (10) and not suspicious," said Mr. Cottrell, Anonymizer’s president. " (11) is that they are not very fast. When we (12) , it takes them a long time to block. "
But the governments (13) catch up, so privacy-protection companies must develop (14) to bypass the blocking technology. To control Web access, governments need to collect (15) . To Counter the governments, privacy- protection service must (16) .
In March, Safe Web (17) by releasing Triangle Boy software. With Triangle Boy, Mr. Hsu devised a system in which users around the world can (18) that allows their computers—and their Internet protocol addresses—to be used as conduits for sites that would (19) . Triangle Boy presents a problem for blocking programs, which have to try to (20) because the information is no longer stored on central servers.