I research tor, and have some question bout it.
Can relay node know which entry node transferred certain traffic? Or can't, cause tor uses ephemeral encryption and after circuit ends, keys removed, in case relay-node doesn't sniff traffic, and define, what entry node transferred traffic, impossible?
Does relay node save date, what entry nodes transferred certain traffic and to what exit nodes in certain time, does relay-node logs connections? And same about entry nodes. If all 3 tor nods in circuit sniff traffic, might it find sender of certain traffic in this case?
Are there some possibilities to log and keep traffic on relay and entry nodes? Software, etc?