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Consensus on server-side data join #48

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Oct 30, 2023
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4 changes: 4 additions & 0 deletions design-dimensions/Dimensions-with-General-Agreement.md
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Expand Up @@ -14,6 +14,10 @@ This document serves to capture the dimensions with general agreement from the C

The community group has reached general agreement that the _Private Measurement Technical Specification MVP_ may include server processing dependencies, however any server architecture must achieve both a high level of security (which the editors will align with the ongoing [Threat Model](../threat-model) work) as well as ability to explain the privacy and security properties of the system to end users.

### Location of Data Join

Attribution requires joining data from the site of an impression (source) and the site of a conversion (trigger). The community group has reached general agreement that data join could potentially occur off device within a some type of server side architecture.
This is conditional on having adequate protections for any data that leaves a device, in line with our security and privacy goals.

## Privacy defined at least by Differential Privacy

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