The security of cryptocurrencies has once again come under scrutiny due to concerns about the future capabilities of quantum computers and recently discovered vulnerabilities in specialized digital asset storage devices. Against this backdrop, blockchain investigator ZachXBT has proposed an alternative: using a separate old iPhone as a crypto wallet.
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In his view, specialized hardware devices should not always be trusted for signing important transactions and long-term fund storage. Instead, he recommends dedicating a separate smartphone that will not be used for calls, messaging, social media, or other daily tasks. The sole function of such a device should be cryptocurrency management.
The proposal has sparked a discussion among members of the crypto community. Developer Roman Storm generally supported the concept but pointed out a significant limitation of mobile applications: the lack of full support for the BIP39 passphrase.
BIP39 allows for the addition of an extra word or character combination to the standard seed phrase. This results in an additionally protected, essentially hidden wallet. Even if an unauthorized person finds the main recovery phrase, they cannot access the hidden funds without the additional passphrase.
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At the same time, a separate smartphone does not eliminate all threats. According to Storm, one of the main risks remains physical access to the device by individuals in close proximity to the owner. Replacing a hardware wallet with a phone does not inherently solve this problem.
Experts also emphasize that a smartphone is a multi-functional device. It can connect to networks, sync data with cloud services, receive notifications, and run third-party applications. Each additional function potentially expands the attack surface. Therefore, converting an old phone into a secure storage requires technical knowledge and strict digital discipline.
Specialized hardware devices, on the other hand, typically have fewer superfluous functions and support additional security mechanisms. However, recent incidents demonstrate that no storage method can be considered completely foolproof.
The idea of using a separate iPhone may be viable for experienced users who understand seed phrase protection principles, manage network connections, and avoid installing unverified applications. For most cryptocurrency holders, the crucial factor remains not the type of device, but the correct security configuration, secure storage of backup phrases, and minimizing physical access to funds.
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Source: Finbold.