An anonymous reader writes "An article on ZDNet Australia tells of a new technique developed at CAIDA that involves using the individual machine's clock skew to fingerprint it anywhere on the net." Possible uses of the technique include "tracking, with some probability, a physical device as it connects to the Internet from different access points, counting the number of devices behind a NAT even when the devices use constant or random IP identifications, remotely probing a block of addresses to determine if the addresses correspond to virtual hosts (for example, as part of a virtual honeynet), and unanonymising anonymised network traces."
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