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Illustration: Sarah Grillo/Axios

Most data brokers avoid scrutiny by saying the data they collect and sell is “anonymized,” or a summary of a lot of people's information, rather than a single individual’s data.

Yes, but: That "anonymous" data can be used to pinpoint real people, or match that data to other supposedly anonymous profiles.

  • In 2006, AOL released search histories of 657,000 anonymous Americans, hoping the data could spur new research. But those searches contained things like locations, ages and genders — ultimately linkable back to specific people.
  • Researchers like Latanya Sweeney have discovered a variety of other ways to reverse more subtle forms of information. In fact, most Americans can be identified by birthday, gender and zip code, she discovered when she led Harvard’s Data Privacy Lab.
  • Last year, researchers noticed that hashing email addresses — thought to be an anonymizing mathematical function that would turn email addresses into gibberish — could be reversed by taking lists of leaked email addresses and performing trial and error searches.
“Once released, information is hard to control. Thus, over time, the more information and data can be linked and analyzed, the higher the likelihood of being able to make sensitive inferences from it for larger groups of people."
— Alessandro Acquisti, a Carnegie Mellon Professor who has studied re-identification

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AOC and Ilhan Omar want to block Biden’s former chief of staff

Reps. Ilhan Omar and Alexandria Ocasio-Cortez. Photo: Brendan Smialowski/Getty Images

Reps. Alexandria Ocasio-Cortez and Ilhan Omar are boosting a petition against Joe Biden nominating his former chief of staff to a new role in his administration, calling Bruce Reed a "deficit hawk."

Why it matters: Progressives are mounting their pressure campaign after the president-elect did not include any of their favored candidates in his first slate of Cabinet nominees, and they are serious about installing some of their allies, blocking anyone who doesn't pass their smell test — and making noise if they are not heard.

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Axios Re:Cap talks with the turkey giant's CEO Jay Jandrain about what people are buying, what they're asking the "Turkey Talkline" and what the pandemic has meant for his business.

Biden introduces top national security team

President-elect Joe Biden's nominee for Secretary of State Antony Blinken spoke Tuesday at an event introducing the incoming administration's top national security officials, where he told the story of his stepfather being the only one of 900 children at his school in Poland to survive the Holocaust.

What they're saying: "At the end of the war, he made a break from a death march into the woods in Bavaria. From his hiding place, he heard a deep rumbling sound. It was a tank. But instead of the iron cross, he saw painted on its side a five pointed white star," Blinken said.