> For the complete documentation index, see [llms.txt](https://www.mica.wtf/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.mica.wtf/definitions/gdpr/pseudonymisation.md).

# pseudonymisation

Definition of pseudonymisation from Regulation (EU) 2016/679, Article 4, point (5).

|                  |                                            |
| ---------------- | ------------------------------------------ |
| **Defined term** | pseudonymisation                           |
| **Source**       | GDPR                                       |
| **Reference**    | Article 4, point (5)                       |
| **Status**       | Published                                  |
| **Refresh rule** | Regenerate after source legal-text changes |

## Definition

> (5) pseudonymisation means the processing of personal data in such a manner that the personal data can no longer be attributed to a specific data subject without the use of additional information, provided that such additional information is kept separately and is subject to technical and organisational measures to ensure that the personal data are not attributed to an identified or identifiable natural person;

## Source

[GDPR, Article 4, point (5)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02016R0679-20160504).


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