Keystone data breach leaks buyer addresses but not private keys

Keystone disclosed on Saturday that unauthorized access to its website exposed customer names, shipping addresses, contact information and purchase details. The hardware wallet maker says recovery phrases and private keys remain secure. The breach matters to traders because leaked buyer data fuels targeted phishing and extortion against crypto holders, and it adds Keystone to a growing list of hardware wallet makers hit by security incidents in 2026, alongside Ledger.