[tor-bugs] #18638 [Tor]: Write a proposal for PK handshake that uses more client resources than server.
Tor Bug Tracker & Wiki
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Fri Mar 25 21:37:17 UTC 2016
#18638: Write a proposal for PK handshake that uses more client resources than
server.
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Reporter: nickm | Owner:
Type: task | Status: new
Priority: Medium | Milestone: Tor: 0.2.9.x-final
Component: Tor | Version:
Severity: Normal | Keywords: dos
Actual Points: | Parent ID:
Points: medium/large | Reviewer:
Sponsor: SponsorU-can |
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Our current handshakes (TLS, TAP, ntor, and ) all have resource
asymmetries: a client can send junk with very little effort, and thereby
cause a server to spend more CPU. We could instead look for ways to make
sure that a client cannot force servers to spend X resources without
themselves spending something in vicinity of X resources.
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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18638>
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