The man who took on the Kremlin and won is rarely heard from: a tech nomad in self-imposed exile with a reclusive aura and signature all-black attire as a nod to "The Matrix."
Two years ago, Pavel Durov refused to grant Russian security services access to users' encrypted messages on his popular Telegram messaging app, then a favorite of Russian opposition groups. The reply from authorities was either submit or become wiped off the country's digital map.