This Technology Review article says “as more services migrate online, and as tactics of identity thieves become more sophisticated, people will need better ways to manage their information, says Nataraj Nagaratnam, chief architect of identity management for IBM Tivoli.Nagaratnam and other IBM researchers have developed open-source software that they think can help. Called Identity Mixer (Idemix), the digital identity management software lets people make online transactions–from filling out forms to purchasing plane tickets–without disclosing personal information. The software lets a person use artificial identity information, in the form of digital “tokens,” to make online transactions. Using these encrypted tokens, which are issued by trusted sources such as the Department of Motor Vehicles (DMV) or a bank, a person can effectively be anonymous to Web services such as Amazon.com or Expedia, never giving out his or her information”.

Using the Internet Anonymously?