Can crypto users trust the supply chain behind hardware wallets?

The Ledger hardware wallet has sparked concerns about the trustworthiness of its supply chain, as middlemen handling the devices before reaching buyers have come under scrutiny. Joe Grand, a security researcher specializing in hardware security, explained to Cointelegraph that it is nearly impossible for ordinary cryptocurrency owners to detect sophisticated tampering with hardware wallets.

Ledger confirmed that one affected device contained an unauthorized implant, which captured users' recovery phrases and transmitted them over cellular networks. This incident highlights the challenges in ensuring the integrity of hardware wallets, as some experts like Mati Greenspan argue that introducing another chain of trust in the supply chain may not provide significant security benefits.

Trezor, a main rival of Ledger, has its devices undergo authenticity checks and only accept signed firmware, but acknowledges that these safeguards cannot completely rule out physical tampering. Experts recommend users spread their risk across multiple providers and look for signs of tampering, such as damaged packaging or unusual marks.

Ledger has asked resellers to halt sales in Southeast Asia and Hong Kong, while Trezor has announced a reduction in the number of resellers as a preventive measure. Security researchers suggest design changes, such as transparent casings and tamper-resistant enclosures, to mitigate supply-chain attacks, but caution that these measures alone cannot eliminate the risk entirely.