OpenAI says it's investigating after a hacker claimed to have stolen login credentials for 20 million OpenAI accounts and advertised the data for sale on a dark web forum. Though security researchers doubt on the legitimacy of the breach, the AI company stated that it takes the claims seriously, advising users to enable two-factor authentication and stay vigilant against phishing attempts. Decrypt reports: Daily Dot reporter Mikael Thalan wrote on X that he found invalid email addresses in the supposed sample data: "No evidence (suggests) this alleged OpenAI breach is legitimate. At least two addresses were invalid. The user's only other post on the forum is for a stealer log. Thread has since been deleted as well."

"We take these claims seriously," the spokesperson said, adding: "We have not seen any evidence that this is connected to a compromise of OpenAI systems to date."

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