A Twitter spokesman has said it is firing Peiter Zatko, the network security expert it hired in November 2020 as head of security. Changes in the composition of Twitter's security team followed "an assessment of how the organization was being led," according to a company memo. Zatko, known by the handle "Mudge," gained fame as a member of the Cult of the Dead Cow ethical hacking collective in the 1990s and later moved to top cybersecurity research positions at the Defense Advanced Research and
