---
title: "Discussion on \"The re-identification problem that breaks \"anonymized\" data\" | Hashnode"
description: "Discussion on \"The re-identification problem that breaks \"anonymized\" data\". Anonymized data is not anonymous. Here is why re-identification works, what k-anonymity guarantees, and the cases that proved it."
url: "https://hashnode.com/posts/the-re-identification-problem-that-breaks-anonymized-data/6a7d90ee87a448b45fc1d14e"
---

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# [The re-identification problem that breaks "anonymized" data](https://devabkk.hashnode.dev/the-re-identification-problem-that-breaks-anonymized-data?utm_source=hashnode&utm_medium=feed)

Anonymized data is not anonymous. Here is why re-identification works, what k-anonymity guarantees, and the cases that proved it.

Aug 13 · 7 min read · devabkk.hashnode.dev  
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-   [#biometrics](https://hashnode.com/tag/biometrics)
-   [#data-privacy](https://hashnode.com/tag/data-privacy)
-   [#security](https://hashnode.com/tag/security)
-   [#data-protection](https://hashnode.com/tag/data-protection)

## Written by

[Lewis Gilchrist](https://hashnode.com/@lewis-dev)

@lewis-dev · London, UK

  
[View profile](https://hashnode.com/@lewis-dev)

Sharing my thoughts regarding the emergent technologies related to Digital Security and Digital Privacy.

learning about zero-knowledge proofs and decentralized identity, one confusing whitepaper at a time.

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