Kraken’s chief security officer has called for independent testing of hardware wallet seed generation after the Coldcard security flaw.Suspected attacks have drained nearly $90 million in Bitcoin, with Galaxy Research tracking more than 5,200 potential victim addresses.Coinkite has released fixed firmware but says affected users must create new seed phrases because updates cannot repair existing wallets.Security researchers traced the issue to a firmware error that used a weaker random number generator during wallet creation.