How to use ColdCard with Electrum
World Crypto Network
ColdCard signs Bitcoin transactions offline via Electrum using SD cards only—never USB to internet. Workflow: export public key from ColdCard to Electrum, create unsigned transaction, sign on ColdCard hardware, broadcast from software wallet. Privacy requirement: run your own full node instead of SPV, which leaks address data to random servers. Hardware wallet never touches internet-connected hard

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