Congressmen ask FTC to Investigate Internet Use of "Supercookies"
By David M. Silverman
Two Congressmen have written a letter to the Federal Trade Commission (FTC) asking the FTC to investigate certain websites’ use of “supercookies” to track the activities of website visitors after they have left the website and without their knowledge. The letter, written by Congressmen Joe Barton (R-TX) and Ed Markey (D-MA), is based on an August Wall Street Journal article discussing their use. The cookies have become a key issue based on concerns they may be placed without knowledge of computer users and are practically invisible to them. Such so-called “supercookies” differ from traditional HTTP cookies that track user data in that they are small files hidden within Adobe Flash and elsewhere that remain on users’ computers even when browsing history and cache are cleared, and can be picked up even when browsing in “private browsing” mode.