Megaupload.com billed itself as a "cyberlocker, " a means of storing large data files on distant servers.

WSJ: Megaupload Users Face Possible Deletion of Data

Officials declined to say if they were eyeing other large cyberlocker sites for similar practices, but one said the Megaupload case should be viewed as a deterrent to anyone who might engage in large-scale illegal file-sharing.

WSJ: FBI Charges Seven With Online Piracy

The new cyberlocker service is a simplified, super-encrypted successor to Megaupload, the file-sharing site that once reputedly accounted for 4% of all internet traffic, and which US prosecutors had taken offline moments before the helicopters descended in New Zealand a year ago.

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