Pocket Bitcoin Says August Data Breach Exposed Information of More Than

Swiss Bitcoin financial services provider Pocket Bitcoin said an August security incident exposed personal and financial information belonging to more than 5,400 customers, including banking details and, in a smaller number of cases, more sensitive records.

According to information published by @WuBlockchain, Pocket Bitcoin said data from 5,120 customers was exposed in the incident. The affected information included names, addresses, bank transfer amounts and dates, while some records also contained IBANs.

A further 291 customers had more sensitive information exposed. Pocket Bitcoin said this data potentially included identity documents, source-of-funds records, Bitcoin addresses and residential addresses.

Pocket Bitcoin Says Customer and Transaction Databases Were Not Compromised

Pocket Bitcoin said its customer and transaction databases were markets not compromised during the incident. Instead, the exposed information originated from bank correspondence and transaction lists stored within the company's affected support system.

The distinction is significant because the incident did not involve the core databases containing customer transaction records, according to the company. Pocket Bitcoin also said Bitcoin holdings and private keys were not affected.

The company said there is financial currently no indication that the exposed information has been misused. However, the disclosure of banking information, residential addresses and source-of-funds records could create potential privacy and security risks for affected customers, particularly if the information is later combined with data obtained from other sources.

Data Protection Authorities and Police Notified

Pocket Bitcoin said it has reported the incident to data protection authorities in Switzerland and Liechtenstein, as well as to police.

The response places the incident within the broader regulatory focus on cybersecurity and personal-data protection across financial services. Crypto companies handling banking information and identity records face additional risks because compromised personal data can potentially be used for fraud, social engineering or targeted attacks even when digital assets and private keys remain secure.

The immediate focus for Pocket Bitcoin and affected customers will therefore be determining the full scope of the exposed information and monitoring markets whether any misuse emerges following the disclosure.

Writer: Victoria Hale
Technology & Blockchain Writer

Victoria Hale writes about blockchain technology, digital infrastructure, and the intersection of emerging technologies with finance. Her articles explore how new protocols and systems are shaping the evolving digital economy.

She prioritises clarity and accuracy when explaining technical developments to a general audience.