[tor-bugs] #26228 [Core Tor/Tor]: Clarify/determine specification for padding bytes, (formerly also PADDING cell)

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#26228: Clarify/determine specification for padding bytes, (formerly also PADDING
cell)
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 Reporter:  dmr           |          Owner:  dmr
     Type:  defect        |         Status:  needs_revision
 Priority:  Medium        |      Milestone:  Tor: 0.3.5.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:  tor-spec      |  Actual Points:
Parent ID:  #26869        |         Points:
 Reviewer:                |        Sponsor:
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Comment (by teor):

 Actually, we should distinguish between padding relay cells, which need
 randomness because they are relayed, and link cells, which don't need
 randomness because:
 a) they don't have any digests, so randomisation doesn't gain us anything
 b) TLS should protect their payloads from modification

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/26228#comment:13>
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