I am the main author of the referenced paper. We tested more than 1,000 exit relays but don't know the actual number yet. However, it can be determined based on Tor's historical relay descriptors. The reason that's important is because the naive statistic "25 in 1,000 were malicious" is wrong.
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I am the main author of the referenced paper. We tested more than 1,000 exit relays but don't know the actual number yet. However, it can be determined based on Tor's historical relay descriptors. The reason that's important is because the naive statistic "25 in 1,000 were malicious" is wrong.