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revision 1.174 by hemppah, Mon Mar 24 10:15:32 2003 UTC revision 1.175 by hemppah, Mon Mar 24 10:26:09 2003 UTC
# Line 511  peers \cite{osokine02distnetworks}, \cit Line 511  peers \cite{osokine02distnetworks}, \cit
511  whether all proposed algorithms can preserve logarithmic efficiency and scalability properties  whether all proposed algorithms can preserve logarithmic efficiency and scalability properties
512  in real-life applications or not; several tightly structured systems  in real-life applications or not; several tightly structured systems
513  assume that participating peers are homogeneous, and the rate of join or leave operation is low \cite{gurmeet03symphony,  assume that participating peers are homogeneous, and the rate of join or leave operation is low \cite{gurmeet03symphony,
514  \cite{libennowell01observations}}.    libennowell01observations}.  
515    
516  To end user, the biggest difference between these systems is how data lookups are performed. Loosely  To end user, the biggest difference between these systems is how data lookups are performed. Loosely
517  structured systems provide more rich and user friendly way of searching data than tightly structured systems  structured systems provide more rich and user friendly way of searching data than tightly structured systems
# Line 947  For instance, pseudonymity can be used f Line 947  For instance, pseudonymity can be used f
947  peers (e.g., peer identifiers of a tightly structured system).  peers (e.g., peer identifiers of a tightly structured system).
948    
949  Anonymity is widely used in a Peer-to-Peer system in which data publication and non-censorship are important. These include  Anonymity is widely used in a Peer-to-Peer system in which data publication and non-censorship are important. These include
950  Forwarding proxies are used in Freenet \cite{clarke00freenet}, Crowds \cite{reiter98crowds} and Free Haven \cite{dingledine00free}  Forwarding proxies are used in Freenet \cite{clarke00freenet}, Crowds \cite{reiter98crowds} and Free Haven \cite{dingledine00free}
951  in order to provide various types of anonymity. Tangler \cite{502002} and Publius \cite{pub00} use cryptographic sharing methods  in order to provide various types of anonymity. Tangler \cite{502002} and Publius \cite{pub00} use cryptographic sharing methods
952  to split data into fragments \cite{Shamir1979a}. Mix mailer networks, such as \cite{mixminionurl}, are commonly used in  to split data into fragments \cite{Shamir1979a}. Mix mailer networks (e.g., \cite{mixminionurl}) are commonly used in
953  distributed systems, which are able to provide some level of anonymity.  distributed systems which are able to provide some level of anonymity (e.g., \cite{mneturl}).
954    
955  Even if many existing Peer-to-Peer systems are able to provide some of the types of anonymity, there is no  Even if many existing Peer-to-Peer systems are able to provide some of the types of anonymity, there is no
956  such a system which is able to provide all kinds of anonymity as listed above. Specifically, the conflicts  such a system which is able to provide all types of anonymity. Specifically, the conflicts
957  between anonymity and other Peer-to-Peer system properties require more research work.  between anonymity and other properties of Peer-to-Peer system require more research work.
958    
959    
960  \subsection{Access control}  \subsection{Access control}

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