Comments (4)
Publishing something else than private key of infected person is generally a good idea, I believe that EphIDs of ones at risk should be published instead, as in #14
But I see couple of problems with what you propose:
- Number of published items and size of it (even if we use Bloom filter or anything else) grows significantly.
- Encounter is not always a symmetric event. I can imagine multiple scenarios in which I've seen your RiD, but you haven't seen mine and the other way around.
- How does it limit fake contact events attacks? I can still spoof any number of made-up encounters only if I know some RiDs. I see no much benefit of doing it compared to publishing EphIDs of those infected person encountered.
from documents.
Thanks for #14.
- Yes. Perhaps you can't download it all anymore. You square the amount of data I guess.
- I think enforcing symmetry brings a benefit: That would limit large scale fake contact event attacks based on Bluetooth amplifier able to reach a much higher radius.
- You can not prevent it. But this limit one kind of attack (2).
from documents.
Thanks for suggesting this. We have considered this design internally, and it is currently not in our proposal because of the increased bandwidth consumption that it would entail. We continue to hold it on our list of possible-but-not-adopted approaches.
from documents.
What kind of bandwidth consumption are we talking about?
Are we sure we need to download all the data for every client?
from documents.
Related Issues (20)
- Was DP-3T Exposure Calculation.pdf Android only? HOT 1
- Stability of distance estimation in case of using a bluetooth Extender HOT 2
- [Public Engagement] Visual Explainer / Scrollytelling on Privacy Preserving Proximity Tracing
- Mistake in communicating how information is passed around, in CH implementations of the apps HOT 3
- Reproducibility of Figure 1 in "DP3T - Exposure Score Calculation.pdf" HOT 3
- Risk calculation when exposed to multiple infectors both for < 15 min. HOT 7
- Naive secret sharing would allow for "jamming" on a non-physical level
- Why did the SwissCovid team not disclose the existence of the LASEC report? HOT 15
- Add support for multiple epidemics HOT 1
- [DOCUMENTATION] FAQ on Apple/Google framework issues HOT 1
- App feature request: Show stored app data as visualization of contact events HOT 3
- Schedule for F-Droid (and/or direct download) release of the Android app HOT 3
- [DOCUMENTATION] Cartoon, Dutch version, one pager: wrong text in picture 6. HOT 1
- Smartwatch App - Market Analysis (WearOS, WatchOS, Fitbit OS and Garmin Watch OS) and way forward HOT 1
- Who controls the 0xFD68 Bluetooth UUID?
- Potential privacy issue of new Exposure Notifications Express? HOT 3
- Wrong text on panel 6 of the NL onepage graphic HOT 1
- Update French onepage translation HOT 2
- Would like to understand the time window for notification
- Question: Where can I find the BLE MAC randomization code in DP^3T?
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from documents.