Dropbox Faces Suit Over Data Breach of Document-Signing Platform

Cloud-services provider Dropbox Inc. failed to protect hundreds of thousands of people’s personal information that was exposed in an April data breach, a proposed federal class action said.

Steven Guiffre alleged that Dropbox didn’t implement adequate and reasonable data-security procedures, encrypt sensitive information, or provide prompt and accurate notice of the breach.

Information exposed in the breach included emails, usernames, phone numbers, hashed passwords, multi-factor authentication information, and general account settings, according to a complaint filed Thursday in the US District Court for the Northern District of California.

Dropbox said in a breach-notification announcement that the incident appeared to be ...