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One Step Ahead: Privacy and Security Tips
October 17, 2006, Volume 53, No. 8

One Step Ahead

Another tip in a series provided by the Offices of Information Systems & Computing and Audit, Compliance & Privacy.

The Panoptic Web

In his 1993 book, The Panoptic Sort, Annenberg Emeritus Professor Oscar Gandy warned about the threat to privacy that panoptic technology poses. Gandy describes panopticism as continuous, automatic surveillance, and describes efforts to monitor the spread of plague in cities in the 17th century by asking individuals to stand in front of their windows to be inspected for pox, and the design of prisons that permit a few guards to monitor hundreds of inmates.

Classic examples of panopticism today are web search engines such as Google, Yahoo! and AltaVista. Search engines run programs called “spiders” that scour billions of the world’s computers and index literally every single word. Google has two spiders, one that follows every link in the world once a month, and another that indexes frequently updated sites like newspapers and magazines. Wikipedia reports that in 2006, Google indexes were stored on 450,000 computers spread around the world. Google receives about a billion requests a day. In 2005, Google claimed that they indexed over 8 billion web pages, but experts claim that it is closer to 24 billion and expect that the short term goal is to be able to index 100 billion. Yahoo! claims to have indexed over 19 billion documents.

Although it would be impossible to find information on the web without indexing, it’s important to take steps to ensure that private information doesn’t get indexed. Read the tips in the next two issues of Almanac to find out what steps you can take.


For additional tips, see the One Step Ahead link on the Information Security website: www.upenn.edu/computing/security/.

Almanac - October 17, 2006, Volume 53, No. 8