Cwa-wishlist: reporting correct count of currently exposed users (RandomIDCount / Bereitgestellte Schlüssel)

[ST4YHealthy]

Current Implementation

The concrete values of the periodically sent "ExposureChecks" from central server to every single smartphone.
Concrete dataElement: "RandomIDCount"

Suggested Enhancement

To know how effective the use of the corona-warn-app really is, it would be very interesting to know the exact value of the "RandomIDCounts" transmitted by the central server.
To be honest, I do really not understand why it should be a data privacy risk if these values would be the "correct" ones.

Expected Benefits

Users would not have to spent a lot of time to have a look on the web to get these very interesting information!
If not possible - somehow integrate an URL into the app where the user could find these information.
To wait for some of the developers or devOps Members to make these value public is not very satisfying

Example:

On 24th of june with Hash F5430B4B125B23E7D714C49745DD90BEBF53CB3A697EE940322B69FE24D43EC2 the RandomIDCount transmitted was 503
On the web some developers announced, that these "first" 503 IDs would reflect 30 real infected persons.
That's a factor of 16,77 -> maybe the app should somewhere and somehow just show this factor.
This would be very nice and very helpful.

Imagine the RKI or JohnsHopkins publishes 1.000 current exposures per day in germany
Imagine the protocol on your smartphone publishes randomIDCounts matching the math: 1.000*factorX for this day
--> The user would now know, that every infected person has published it's exposure. "What a wonderful world" ;-)

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Internal tracking Id: EXPOSUREAPP-2106

[christian-kirschnick]

The app does not know how many people reported themselves as positive. Not even our backend knows that.

You can make some educated guesses based on the knowledge on how keys are generated, but it will not give you accurate values - it will always be an estimation.

The community came up with some dashboards which may give you some more insights: https://micb25.github.io/dka/

[SonaliDK]

Hi @ST4YHealthy,

Thank you for your proposal. All issues in the cwa-wishlist repository will be discussed with our contracting entities. They will decide whether they will be implemented or pursued further. As soon as we have any updates, we will let you know about the details.

Best regards,

SD

Corona-Warn-App Open Source Team

[ndegendogo]

The app does not know how many people reported themselves as positive. Not even our backend knows that.

Well - somewhere in the system these numbers could be availabe.
E.g. the server that receives a package of DEK keys and inserts them into the database could increment a counter