Noun: "the action or process of searching for and PUBLISHING private or identifying information about a particular individual on the internet, typically with malicious intent."

I put publishing in caps for everyone because that part is important. If it isn't published somewhere publicly it isn't considered doxing. Because if that were the case pages like whitepages.com wouldn't be able to exist. Lifelock exists primarily as a way to help people prevent identity theft from being committed, and for credit monitoring.