Pocket Bitcoin Breach Exposes Names, Addresses and Bitcoin Wallets for Thousands

Swiss Bitcoin service Pocket Bitcoin has closed its investigation into a data breach that affected 5,411 customers. For a smaller subset of 291 people, the exposure was more severe: their Bitcoin addresses were leaked alongside copies of their identity documents.

This combination is particularly damaging because it links a person's real-world identity directly to their cryptocurrency activity. Unlike a leaked password, this pairing cannot be reset — attackers can use it for targeted phishing, extortion, or physical threats against known cryptocurrency holders, and the exposed identity documents could also be used for identity theft.

The company has notified affected users, and the source article encourages customers of any crypto or financial service to check what personal data their provider holds and how it is protected.