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By this point, you've hopefully gotten the message that your personal data can end up exposed in all sorts of unexpected internet backwaters. But increased awareness hasn't slowed the problem. In fact, it's only grown bigger\u2014and more confounding. Last week, security researchers Bob Diachenko and Vinny Troia discovered an unprotected, publicly accessible MongoDB database containing 150 gigabytes-worth of detailed, plaintext marketing data\u2014including 763 million unique email addresses.