The internet never forgets, which means data that should have been deleted doesn’t always stay deleted. Call it “zombie data,” and unless your organization has a complete understanding of how your cloud providers handle file deletion requests, it can come back to haunt you.
Ever since the PC revolution, the concept of data deletion has been a bit misunderstood. After all, dragging a file to the Recycle Bin simply removed the pointer to the file, freeing up disk space to write new data. Until then, the original data remained on the disk, rediscoverable using readily accessible data recovery tools. Even when new data was written to that disk space, parts of the file often lingered, and the original file could be reconstructed from the fragments.
Source: Infoworld.com | Security