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Guard relays are the first hop of any circuit through Tor. This category is for guard specific questions.

7 votes
1 answer
415 views

What, precisely, are the criteria for determining if a relay will be flagged as a guard?

entry does not describe the process by which a relay becomes a guard. The word "flag" is not mentioned anywhere in the FAQ index. … Arma's "The lifecycle of a new relay" post lists three general criteria: Directory authorities assign the Guard flag to relays based on three characteristics: "bandwidth" (they need to have a large …
pmocek's user avatar
  • 556
12 votes
1 answer
2k views

How do entry guards protect against a service location attack?

The paper Locating Hidden Servers mentions three attacks that can reveal the location of hidden servers. Among those is the service location attack. The paper states that the Tor network's use of en …
pmocek's user avatar
  • 556