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Removed member should not be able to know if a member is online #690

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holmesworcester opened this issue Jul 5, 2022 · 1 comment
Open

Removed member should not be able to know if a member is online #690

holmesworcester opened this issue Jul 5, 2022 · 1 comment
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security
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@holmesworcester
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Tor authentication alone will not stop a removed member from knowing if a member is online. To the extent Tor permits (it currently does not seem to--see: https://gitlab.torproject.org/tpo/core/torspec/-/issues/119) we should use Tor to prevent this, so that removed members cannot "stalk" members and learn about their usage patterns.
@holmesworcester holmesworcester created this issue from a note in Quiet (Blocked) Jul 5, 2022
@holmesworcester holmesworcester moved this from Blocked to Backlog - Desktop & Backend in Quiet Jul 5, 2022
@holmesworcester
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This might be a reason to use the "waiting room network" approach to removing users, where we have a persistent network for peer discovery and joining, and an ephemeral one for communication that can be destroyed and recreated with new onion addresses when a user is removed.

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Status: Backlog - Desktop & Backend
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