US cyberagencies mum on how they try to identify cyberattackers

Members of a Senate subcommittee on Tuesday asked criminal and security agency officials responsible for securing the nation’s most sensitive computer systems and networks how they identify who is behind a specific cyberattack, despite the difficulty in doing so.Tracing cyberattacks back to a specific source can be a difficult process because attacks can be routed through numerous computer networks worldwide, making it nearly impossible to identify the computer network where the attack started. Cyberattacks that took down government Web sites in South Korea and the United States in July, for example, initially were attributed to North Korea, but no hard evidence has emerged identifying systems there as the origin of the disruption.

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