Crypto hardware maker Ledger SAS is reviewing its policies and processes for how its devices are sold to consumers, after spyware implanted in some wallets led to an estimated US$90mil (RM367mil) in stolen cryptocurrency.

The Paris-based firm is also assessing its anti-tampering protections, Ledger chief technology officer Charles Guillemet said in a social media post on Oct 13. He asked users who suspected their devices had been tampered with to review Ledger’s guidelines for how to safely open up their hardware before doing so, and to send any suspicious devices to Ledger for further examination.

“Physical supply chain tampering is a risk for the whole…