作者：Oliver Berthold, Hannes Federrath, Marit Köhntopp
摘要：It is a hard problem to achieve anonymity for real-time services in the
Internet (e.g. Web access). All existing concepts fail when we assume a very strong
attacker model (i.e. an attacker is able to observe all communication links). We also
show that these attacks are real-world attacks. This paper outlines alternative models which mostly render these attacks useless. Our present work tries to increase
the efficiency of these measures.