Keystone confirms breach: Hackers stole key used to verify wallet authenticity, affecting 18,835 devices

Hardware wallet maker Keystone disclosed that attackers who breached its website last week stole an authentication key used to verify device genuineness. The stolen key could allow production of counterfeit wallets that pass authenticity checks. Keystone plans to destroy 18,835 devices in inventory containing the compromised key and has suspended shipments of devices using it. The company says devices manufactured before Oct. 20 are safe, but those delivered after cannot be guaranteed authentic.