Replay Attack

Background

In a replay attack an attacker passes a stream of messages between two parties and the continually replays the stream to one or several more other parties.

It can be processed by the original sender or advisory that receives the data and then retransmits to as a masquerade attack from a IP packet substitution.

Defence Mechanism

There are a few ways to low the risks of an attack, one way is to use a session token.
This Session token can only be successful if it is chosen randomly.

References

http://en.wikipedia.org/wiki/Replay_attack
http://msdn.microsoft.com/en-us/library/aa738652.aspx

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