EFF: One Year Later, Hundreds of Tor Challenge Relays Still Active The Electronic Frontier Foundation reports that 567 relays from the 2014 Tor Challenge are still up and running—"more than were established during the entire inaugural Tor Challenge back in 2011. To put that number in perspective, these nodes represent more than 8.5% of the roughly 6,500 public relays currently active on the entire Tor network, a system that supports more than 2-million directly connecting clients worldwide."