corona-warn-app

cwa-documentation

TeX2020–2023

corona-warn-app / cwa-documentation · Archived

cwa-documentation

Project overview, general documentation, and white papers. The CWA development ends on May 31, 2023. You still can warn other users until April 30, 2023. More information:

Learning & Reference

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14Distinct people

15Mentions

0Explicit recommenders

3.2KGitHub stars

REPOSITORY AT A GLANCE

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What it is

Project overview, general documentation, and white papers. The CWA development ends on May 31, 2023. You still can warn other users until April 30, 2023. More information:

GitHub

Where it is used

No documented product use was verified in the last source check.

What people are saying

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Also in these discussions

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This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:56:07 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year15 dated mentions

Observed mentions: 2020-05-13 06:02:45 UTC to 2023-06-16 08:44:13 UTC.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges

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Period	Start (UTC)	End (exclusive, UTC)	Mentions	Submissions	Comments
2020	2020-01-01 00:00:00 UTC	2021-01-01 00:00:00 UTC	12	8	4
2021	2021-01-01 00:00:00 UTC	2022-01-01 00:00:00 UTC	1	0	1
2022	2022-01-01 00:00:00 UTC	2023-01-01 00:00:00 UTC	1	0	1
2023	2023-01-01 00:00:00 UTC	2024-01-01 00:00:00 UTC	1	0	1

What Hacker News says

15 sources

rpadovani·Jun 16, 2023

CWA was using the Exposure Notifications from Apple and Google[0]. Exposure Notifications is not an app, but a framework and a protocol, and CWA was an implementation of it, hooking in the features developed by Apple and Google for iOs and Android [0]: https://github.com/corona-warn-app/cwa-documentation/blob/ma...

In Alphabet selling Google Domains assets to Squarespace

neoeno·Apr 11, 2022

I was developing some architecture training recently and had this very same question. It’s not easy to find realistic architectures. The best I found was the German contact tracing app — Corona Warn App. It was done by a group of consultancies in collaboration with the German govt, and went from inception to launch in around fifty days — largely if not totally open source. Here’s the repo that has all the architecture in: https://github.com/corona-warn-app/cwa-documentation It’s got full git history so you can see it evolve over time, along with the implementations (also on Github). There’s a pretty fascinating short talk by one of the people who led the project on youtube too — more about the process side though: https://youtu.be/5y1sHSkPWRg?t=1770

In Ask HN: Where can I see many examples of real companies' software architecture?

makepanic·Mar 31, 2021

The cwa app will support event registration in the next version too. See https://github.com/corona-warn-app/cwa-documentation/blob/ma... for details on how they do it.

In Copyright infringement by German contact tracing app

absolutelyrad·Dec 21, 2020

> The limitations of what can be done without the iOS/Android APIs are too high to make the app useful, as can be seen in the official documentation: https://github.com/corona-warn-app/cwa-documentation/blob/ma... This is the core reason I'm so against these duopolies. I have a startup idea that I want to implement. I've done it on windows, and it's flawless. Should work on macOS too. But these mobile OS's don't provide the right API's to do it. Android offers access to do it in a half assed way, and the way to do it right is to do it the correct way, flawlessly. So I'm stuck in a limbo, I want to be the first and last to market, prepared for when these companies break up, the OS offers access to some API's I want, and capture the market. There may be little network effects to the idea. But it's going to be a big market for everyone, with

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plenty of competition if idiots offer the right API's. [edited it gave away a bit too revealing info]. Enough that I don't ever connect my development machine to the internet to make sure no source code ever leaves. My test users have asked me when will I offer a mobile app? The app needs mobile integration to make it work the way the idea was supposed to be. All OS's that the user uses, together. And, I have no response to their questions and the mails end up collecting dust. These fuckers ruin innovation for everyone and it makes me mad. If these companies don't get broken up with a competitive mobile OS landscape again, don't get mad when I jump ship and go with some OS Huawei makes if it offers the right way and gains adoption. If America wants competitiveness, innovation and a technological lead, it has work to do at home: Trust busting needs to happen fast.

In Herald – Bluetooth contact tracing protocol

merlinscholz·Dec 21, 2020

Sadly it's the exact same situation as with the German covid app. The limitations of what can be done without the iOS/Android APIs are too high to make the app useful, as can be seen in the official documentation: https://github.com/corona-warn-app/cwa-documentation/blob/ma...

In Herald – Bluetooth contact tracing protocol

barbegal·Jun 3, 2020

I really question whether these apps will be effective. The limitation section https://github.com/corona-warn-app/cwa-documentation/blob/ma... of their architecture document shows that people in close proximity for a few minutes may not even get picked up. Anyone who has dealt with trying to work out distance from Bluetooth signal strength will know that it is virtually impossible once you factor in, the orientation of two devices (signal polarization), their locations (in a pocket, bag, case...) and the local environment (reflections and attenuation from walls, floors ceilings, furniture). Additionally, without knowing exactly how transmission is occurring the risk score calculation https://github.com/corona-warn-app/cwa-documentation/blob/ma... may be wildly inaccurate too resulting in the wrong people being notified. And even assuming

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perfect ability to deduce the risk of infection of two people using the app, will that help in the bigger context. If the people most at risk don't install this app and the least at risk do then you may be drawing resources away from the people that most need help.

In Germany's Covid contact tracing app is Open Source

fredrb·Jun 3, 2020Submission

Germany's Covid contact tracing app is Open Source

199 points · Open discussion

realityking·Jun 1, 2020Submission

Open-Source Corona-Warn-App (Germany)

1 points · Open discussion

tosh·May 18, 2020Submission

Architecture of German Coronavirus App on GitHub

24 points · Open discussion

johannes1234321·May 18, 2020

This is the German government's project executed by SAP and Deutsche Telekom. The source of the client app is to be released soon as well. All under APL2. System is described in https://github.com/corona-warn-app/cwa-documentation

In Back end implementation for the Apple/Google exposure notification API

_tk_·May 17, 2020Submission

Architecture and documentation of official German Corona-Warn-App

10 points · Open discussion

doener·May 17, 2020Submission

German Corona App Solution Architecture

1 points · Open discussion

grst·May 13, 2020Submission

Corona-Warn-App (Germany's official contact tracing app)

2 points · Open discussion

brodo·May 13, 2020Submission

Germany’s Corona-Warn-App