US cyberwar firing range to demo by July

"DARPA has previously specified that the Cyber Range is to be able to simulate a network on the same scale as the internet or the US military's Global Information Grid. In addition to the various kinds of machinery, the Range will also be populated by software "replicants" playing the part of human users, admins and other people whose actions would register on the network. The replicants' behaviour is to be affected realistically as the frightful code bombs and cyber missiles of tomorrow devastate their peaceful world, so modelling the war-warez' effects accurately."

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