Twitter appointed Peiter Zatko, famous for his hacker handle Mudge, to the position of head of security, to recommend changes in physical and digital structure and practices. Zatko will report to CEO Jack Dorsey and is expected to take over the new role after a 45-to 60-day review. Twitter faces numerous cybersecurity challenges. In July, hackers got access to internal tools, which let them tweet from the accounts of Joe Biden, Bill Gates, Elon Musk, and many.

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