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sign verify message electrum, MyEtherWallet: How to sign and verify a wallet address

The digital signature method originates from the use of the public key, and the consumer (signer) generates a pair of keys: the public key and the private key. The consumer keeps the private key himself and is able to "sign" any message with the private key, resulting in a corresponding digital signature. Anyone holding the public key can verify the correctness of the message and the associated signature.

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and Android system. Installing Electrum requires you to write down a 12-word seed to help you recover your wallet on multiple devices. If you forget your private key, this seed can also make Electrum look more human. In addition, Electrum has a "cold storage" mode where you don't have to pay Bitcoin to view your balance.