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Security researcher Christopher Soghoian filed an FTC complaint alleging Dropbox had told users their files were inaccessible even to Dropbox employees, while its actual architecture — and a quietly revised Terms of Service — made clear the company could decrypt and hand over files.

Privacy & Encryption ConcernsLegal Actions & Lawsuits
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2 sources
Criticalfewer than a hundred, per Dropbox's final count (initially described as 'much less than 1 percent' of accounts that logged in during the window)

The 2011 authentication bug: any password unlocked any account

For nearly four hours on 19 June 2011, a code update left Dropbox accounts accessible with any password at all — anyone could sign in to any account by typing anything.

Security Incidents & Data BreachesPrivacy & Encryption Concerns
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Days after Dropbox disclosed the June 2011 bug that briefly let anyone sign into any account with any password, a plaintiff filed a class action alleging privacy and consumer-protection violations; the case was terminated within four months.

Security Incidents & Data BreachesLegal Actions & Lawsuits
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The 2001 USA PATRIOT Act expanded US government access to records held by domestic companies and became the original reason foreign organizations distrusted storing data with US cloud providers — a concern that still attaches to Dropbox today.

Privacy & Encryption ConcernsGovernment Access & Surveillance
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Under the 1986 Stored Communications Act, US law enforcement can obtain a Dropbox user's basic subscriber records with a subpoena, account usage records with a court order, and the actual contents of their files with a search warrant — a tiered framework Dropbox publishes in its own guidelines.

Privacy & Encryption ConcernsGovernment Access & Surveillance
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