Zatko, center, was among a group of hackers who testified before Congress on cybersecurity in 1998.
Mandatory Credit: Douglas Graham/CQ-Roll Call, Inc./Congressional Quarterly/Getty Images
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Ex-Twitter exec blows the whistle, alleging reckless and negligent cybersecurity policies
Twitter has major security problems that pose a threat to its own users' personal information, to company shareholders, to national security, and to democracy, according to an explosive whistleblower disclosure obtained exclusively by CNN and The Washington Post.
