Twitter Whistle-Blower Testimony Spurs Calls for Tech Regulator

Senators across the ideological spectrum vowed to pursue stricter regulation for social media in response to Tuesday’s whistle-blower testimony about what he called the “ticking bomb of security vulnerabilities” at Twitter Inc.

Former Twitter security chief Peiter Zatko, also known by his hacker name “Mudge,” spent more than 2 1/2 hours describing a company with outdated software, broad employee access to personal user data and a reactive security policy that had engineers running “from fire to fire.” He also spotlighted what he said was ineffective enforcement from the Federal Trade Commission that was “letting companies grade their own ...