Mark Karpelès has identified another suspected hardware wallet implant, raising concerns about supply chain security for Ledger devices. Ledger maintains that related thefts are currently limited to units sold through CryptoBilis but acknowledged a critical limitation in its verification tools. The company confirmed that its Genuine Check feature cannot detect spy implants if the device's secure chip remains intact. This vulnerability allows compromised hardware to pass standard authenticity verification while potentially exposing users to asset theft.