Privacy Enhancing Technologies have been refined over the past 10 years. The following paragraphs discuss and review these technologies.
Communications anonymity and anonymizers systems seek to remove the identity of the person sending the information through the Internet. These consist of systems that protect the IP address and other network address from the communication partners. The most popular software is Freenet. Communications by Freenet nodes are encrypted and are routed through other nodes to make it extremely difficult to determine who is requesting the information and what its content is. Freenet's main attraction is parents who have children and don't want their identity exposed to other people on the Internet. Other uses make it difficult for governments track them on the Internet. This is useful for people who have oppressive governments and some countries make the use of Freenet illegal.
Identity management services use the anonymity method and add attributes to establish pseudo credentials that can be removed from the Internet. Some systems are developed to use this idea in commercial projects. Perhaps the easiest method of understanding the pseudo credential is creating a free e-mail with a provider such as yahoo.com. During the creation process, registration is up to the user to create the identity. The person types in a fake name and address then a pseudo credential is available for use on the web. By using a anonymizer such a re-mailer when sending out e-mail's the pseudo credential is completely hidden.