Aleksandr Kolchanov is an independent security researcher and consultant. Ex penetration tester of a bank in Russia. He takes part in different bug bounty programs (PayPal, Facebook, Yahoo, Coinbase, Protonmail, Yandex, Privatbank). Aleksandr is interested in uncommon security issues, telecom problems, privacy, and social engineering. Speaker at PHDays 2018 and 2019, c0c0n 2018, DeepSec 2018, HiTB 2019, Infosec in the City 2019, OzSecCon 2019 and BSides.