Abstract: With the rapid development of Internet technology, the era of big data with explosive growth of information came into being. Big data analyzes massive amounts of data in an unprecedented way, thus obtaining great value. However, big data is also a "double-edged sword". While enjoying the convenience brought by big data, we also face the serious challenges of worrying about information security and revealing personal privacy. Then how to protect personal privacy in the era of big data is a social issue that the whole society needs to think about and pay attention to.Key words: big data; Information security; privacy
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