Trust Falls: Hardware Wallets Hand Users a Chain They Can't Inspect 🔗

Hardware wallet users are not realistically equipped to detect sophisticated supply-chain tampering on their own, hardware security researcher Joe Grand told Cointelegraph on Tuesday. Grand, who specializes in chip-level security and has helped recover funds from locked devices, said even technical users rarely inspect the internals of every unit they handle. "It's really hard to explain to people how they're supposed to look at their devices, because even technical people like me are not looking at every single device to see if it's been tampered with," Grand said.

The concerns intensified after Ledger confirmed Saturday that one device sold through CryptoBilis, a reseller listed as authorized in Indonesia, Malaysia and the Philippines, contained an unauthorized implant. According to Ledger, the malicious implants captured users' recovery phrases and transmitted them over cellular networks. Crypto losses connected to the affected devices were first reported Friday. Ledger has since asked resellers in Southeast Asia and Hong Kong to halt sales, and MediaMarktSaturn pulled Ledger products amid the tampering reports.

Industry figures split on what the episode means for hardware wallet adoption. Crypto analyst Mati Greenspan, active in the industry since 2013, said he has never used a hardware wallet because each new device adds another layer of trust. "When you buy a hardware wallet, you're introducing a whole new chain of trust, from the manufacturer to the supplier to whoever handled the device before it reached you," Greenspan said. Nick Neuman, CEO of Bitcoin security company Casa, said eliminating third-party trust entirely is impossible. "There is always an intermediary you will need to trust," Neuman said, recommending that users spread risk across multiple providers rather than rely on a single one.

Trezor, one of Ledger's main competitors, said its devices undergo authenticity checks and accept only signed firmware, but acknowledged that those measures cannot rule out physical modification. A Trezor spokesperson told Cointelegraph, "You can also check that the packaging and holographic seal are intact and look for unusual marks on the device, but these checks alone cannot guarantee that it has not been modified." Trezor noted that the Ledger implants posed a different challenge because they harvested screen data without altering firmware, and said it has not observed the same type of attack on its own devices.

On Tuesday, Trezor said it would reduce its reseller count as a preventive step. Grand has previously developed techniques to bypass protections and extract data from memory chips in Trezor and KeepKey wallets, and his comments underscored how limited end-user checks remain against nation-state or well-resourced tampering.