No subject


Tue Mar 1 03:45:00 UTC 2011


Why does frequent connecting and disconnecting of the internet connection reduce =
the level of anonymity?

Someone observing your computer would know when you are connected to the internet =
or to the anonymization service. If this observer also observes the first mix =
in the anonymization service, he would see connections and disconnections there =
as well. He could then draw conclusions as to which user is visiting which =
website.

Let us assume the following example:

    * It is known that a user is downloading a large file (for example, 50MB).
    * It is also known that another user is only surfing.

The observer also sees that one of them frequently connects and disconnects =
from the internet while the other is constantly connected. Then it's clear =
that the one who is constantly connected is downloading the file and the other =
one is the one surfing. Somit ist klar, wer von beiden die Datei herunterl=C3=A4dt =
und wer nur surft.

The problem remains even with many users. Statistical averages can be made =
of people who were logged in at the same time. Thus it becomes relatively easy =
to determine who did what at what time. 

***



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