The company hasn't even clarified when the breach occurred. LastPass has not returned WIRED's multiple requests for comment about how many password vaults were compromised in the breach and how many users were affected. Now, nearly a week since the disclosure, the company has not provided additional information to confused and worried customers. The details LastPass provided about the situation a week ago were worrying enough that security professionals quickly started calling for users to switch to other services. For the security service's 25.6 million users, though, the company made a worrying announcement on December 22: A security incident the firm had previously reported (on November 30) was actually a massive and concerning data breach that exposed encrypted password vaults-the crown jewels of any password manager-along with other user data. And if you finally took the plunge with a free and mainstream option, particularly during the 2010s, it was probably LastPass. You've heard it again and again: You need to use a password manager to generate strong, unique passwords and keep track of them for you.

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