Cwa-app-android: Showing time of risk encounter

Created on 30 Sep 2020 · 6Comments · Source: corona-warn-app/cwa-app-android

It would be really helpful to show the timestamp of the risk encounter (especially for low risk encounters).

This might help the user to identify its own location during this time. It should not reduce the privacy.

feature request

Source

Timo1993

👍2 👀1

Most helpful comment

@Timo1993 I'll quote my reply from here:

The exact timestamp of an encounter is not exposed by the Exposure Notification Framework (ENF) for privacy reasons afaik. Therefore CWA cannot show an exact time but only the day when the exposure occurred (see here for more details on the response CWA gets from ENF). If you have a rooted android device you can bypass this restriction e.g. with the corona-warn-companion-android though.

Regarding the display of the day of the encounter (for green encounters): This is tracked in the issue @MikeMcC399 mentioned above and hopefully we will soon see some movement on this issue 🤞.

daimpi on 30 Sep 2020

👍3

All 6 comments

MikeMcC399 on 30 Sep 2020

👀1 👍1

@Timo1993 I'll quote my reply from here:

The exact timestamp of an encounter is not exposed by the Exposure Notification Framework (ENF) for privacy reasons afaik. Therefore CWA cannot show an exact time but only the day when the exposure occurred (see here for more details on the response CWA gets from ENF). If you have a rooted android device you can bypass this restriction e.g. with the corona-warn-companion-android though.

Regarding the display of the day of the encounter (for green encounters): This is tracked in the issue @MikeMcC399 mentioned above and hopefully we will soon see some movement on this issue 🤞.

daimpi on 30 Sep 2020

👍3

I am quite certain that the json you can export on non-rooted phones did contain a timestamp. I had a low-risk contact reported once and was able to identify that I was in the beergarden at that time. given open-air setting and large distance between tables I felt more relaxed.

stephankn on 7 Oct 2020

I am quite certain that the json you can export on non-rooted phones did contain a timestamp.

This is correct. But this timestamp only gives you the time when your phone compared diagnosis keys (DKs) it downloaded from the server with the rolling proximity identifiers (RPIs) it recorded from contact with other phones. This doesn't directly tell you anything about when the actual encounter happened. I've written about this in more detail here and here if you're interested.

daimpi on 7 Oct 2020

Hey @Timo1993 ,

As @MikeMcC399 already pointed out, there already is a wishlist entry for this feature https://github.com/corona-warn-app/cwa-wishlist/issues/178 . Please continue the discussion there and give the issue a 👍 so that we can see how popular the feature request is. This helps the devs to prioritize new features. I'll close this issue as a duplicate.

Thanks.

Corona-Warn-App Open Source Team