# O3.23 Establish robust data delinking mechanisms

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{% tab title="Principle" %}
[O3: Ensure data privacy by design](https://safedpi.gitbook.io/safeguards/universal-dpi-safeguards-framework/principles/operational-principles/o3-ensure-data-privacy-by-design)
{% endtab %}

{% tab title="Risk" %}
[RS1 Privacy vulnerability](https://safedpi.gitbook.io/safeguards/universal-dpi-safeguards-framework/risks/risks-to-safety)
{% endtab %}

{% tab title="Life Cycle Stage" %}
[L2: Strategy and Design](https://safedpi.gitbook.io/safeguards/universal-dpi-safeguards-framework/life-cycle-stages)
{% endtab %}
{% endtabs %}

## Practices

> * Use automated scripts that routinely delink identifiers from datasets after data processing is complete, as practiced in some Nordic countries’ privacy frameworks.
> * Implement temporary session identifiers in online services that expire after the session ends. Pairwise pseudonymous identifiers should be used wherever possible to prevent correlation of user data across interactions.

## Resources

<table data-view="cards"><thead><tr><th></th><th></th><th></th></tr></thead><tbody><tr><td>References</td><td></td><td></td></tr></tbody></table>