Keeping Cold Crypto Wallets Accessible Yet Secure with Remote Signing

Blockchain Today
5 min readFeb 16, 2024

Hardware crypto wallets enable safe offline asset storage avoiding online hacking risks. But transmitting signed transactions from these “cold” devices to move funds requires risky connectivity exposing private keys. Remote signing bridges this airgap without compromising security via clever cryptography.

We examine vital remote signing techniques allowing functional usability for airgapped wallets critical in institutional crypto custody and national digital currency rollouts worldwide.

The Paradoxical Problem of Airgapped Wallets

To guard against external attacks, best security practices mandate keeping cryptocurrency private keys in specialized hardware wallets storing assets “cold” i.e. entirely offline. No connectivity means no remote hacking access for thieves.

But offline devices cannot broadcast signed transactions onto blockchains either to actually move funds later. At some point airgapped wallets require connectivity exposing private data. This temporary linkage poses security risks defeating airgap benefits.

Remote signing resolves this paradox in ingenious fashion. It permits cold wallets signing transactions without ever linking physically to internet devices handling blockchain…

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