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Literature.Review
WSGrid involves the idea of Node-to-Node Computing (abbreviated to N2N computing).
N2N computing derives from Peer-to-Peer Computing (P2P Computing). It is also a new
architecture in distributed computing. Therefore, this section firstly briefs the evolution of
distributed computing, including grid computing, and then moves to the security requirements
that a grid system should fit. Finally, several current security solutions of other grid systems
will be provided.
The.Evolution.of.Distributed.Computing
The predecessor of distributed computing was the Client-server architecture, first used in the
1980s (Schussel, 1995). Client-server architecture sorted all the participants (computers) in
the whole system into two groups, clients or servers. A server in a client-server system is a
computer with much higher power, better performance, and connectivity, and can execute
over a long period of time. A server can serve more than one client at a time, following
their requests. On the other hand, a client (which might be personal computers) has usually
a single processor and is less powerful and has fewer resources.
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