Offline Bitcoin Wallets Under Scrutiny Amid Recent Security Breaches
Recently, several incidents involving hardware wallets and crypto providers have raised concerns about the security of storing Bitcoin offline. According to DSec Labs, a Brazilian company specializing in blockchain infrastructure and digital asset security, these attacks are not just limited to internet connectivity but also involve the entire self-custody chain.
The chain includes not only the physical device but also the software used to generate keys, logistics providers, order systems, and personal information of buyers. 'The market has concentrated on discussing the difference between leaving assets in a brokerage or storing them in an offline wallet,' says Guilherme Campos, DSec Labs' COO.
A case involving Coldcard, a Canadian hardware wallet provider Coinkite, highlighted the risks of key generation vulnerabilities. A flaw in the phrase-seed generation process reduced randomness, making some combinations more predictable and allowing hackers to test possible keys until finding addresses with balances.