Iris recognition relies upon the fact that every individuals retina has a unique structure. The iris landscape is composed of a corona, crypts, filaments, freckles, pits radial furrows and striatations. Iris scanning is considered a particularly accurate identification technology because the characteristics of the iris do not change during a persons lifetime, and because there are several hundred variables in an iris which can be measured. In addition, iris scanning is fast: it does not take longer than one or two seconds.
These are characteristics which have made iris scanning an attractive technology for high-security applications such as prison surveillance. Iris technology is also used for online identification where it can substitute identification by password. As in other biometric technologies, the use of iris scanning for the protection of privacy is a two-edged sword. The prevention of identity theft applies horizontally but not vertically, i.e. in so far as the data retrieval that accompanies identification and the data body which is created in the process has nothing to do with identity theft.
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Since the end of June in France anonymous publishing - on the World Wide Web, in newsgroups, mailing lists or chat rooms - is prohibited. The use of pseudonyms, so popular in chat rooms, e.g., is not restricted, but the true identities of those who "publish" on the Net must be known to the users' Internet service and Internet content providers. Additionally, Internet providers are obliged to point out the possibility of blocking access to material to their customers and to offer them appropriate technology for blocking access.
Loi sur la communication audiovisuelle, http://www.legalis.net/jnet/2000/loi-audio/projetloi-fin.htm
Source: Florian Rötzer, Frankreich hat mit der Anonymität im internet Schluss gemacht, in: