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docs(evreg): rephrase 3rd party information for integration

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Maximilian Lenkeit 2021-05-01 16:59:45 +02:00
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event_registration.md
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# Event Registration - Summary
Presence Tracing - in CWA also referred to as _Event Registration_ - aims at notifying people of a potential SARS-CoV-2 exposure if they have been to the same venue at a similar time as a positively tested individual. It addresses the potential of airborne transmission in spaces with poor ventilation despite maintaining physical distance. As such, it complements BLE-based proximity tracing with the Exposure Notification Framework.
Presence Tracing - in the Corona-Warn-App (CWA) also referred to as _Event Registration_ - aims at notifying people of a potential SARS-CoV-2 exposure if they have been to the same venue at a similar time as a positively tested individual. It addresses the potential of airborne transmission in spaces with poor ventilation despite maintaining physical distance. As such, it complements BLE-based proximity tracing with the Exposure Notification Framework.
CWA proposes a fully-automated decentral solution for Presence Tracing which works independent of local health authorities and the collaboration of the host of a venue. It integrates into the existing verification processes of CWA to issue warnings. The solution prioritizes the speed of issuing warnings over their accuracy. A higher degree of accuracy would require manual assessment by local health authorities and the respective resources to do so and is currently not in scope. The solution also protects the privacy of both venues and users, as details about a venue such as description or address are not shared with the CWA infrastructure.
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| `[VENDOR_ADDITIONAL_DATA]` | Additional vendor-specific data (optional). |
| `<ENCODED_PAYLOAD>` | A representation of the Protocol Buffer message `QRCodePayload` encoded in base64url. |
**Note:** Any contact tracing apps that integrate with CWA must ensure that they do not process any information from the CWA part of the QR code. All apps/hostnames needs to be explicit whitelisted by the CWA to accept other QR-Codes
**Note:** QR codes that are generated by other contact tracing apps must be allowlisted individually per app (based on the hostname in the QR code) before they can be scanned and are accepted by CWA. Such contact tracing apps must ensure that they do not process or store any information from the CWA part of the QR code.
Examples: