Re: blockchain.info: How to sign a message from previously used addresses
Signing a messsage is only available for imported addresses, If the address is a part of your HD wallet, then that feature won't be available. Quoting it with the link you provided:
But there are still ways to sign a message
1. Using some third party tools:
2. Importing it in another wallet and signing a message there. I recommend electrum for that
Using your seed/backup phrase:
*Please note that when importing, your funds will be accessible on both wallets which is why it's highly advisable to transfer them in a new wallet (with different seed/PK's) once the network has stabilized to avoid high fees.
Here's a tutorial to sign a message in electrum: https://www.cryptocompare.com/wallets/guides/how-to-sign-a-message-with-electrum
You can also import just one address using its private key. Use the iancoleman bip39 tool for deriving your PK's as mentioned above
Guide: https://bitcoinelectrum.com/importing-your-private-keys-into-electrum
Quote from: https://support.blockchain.com/hc/en-us/articles/210353833-What-is-message-signing-and-how-can-I-do-that-
This feature is currently only available for your Imported Addresses
But there are still ways to sign a message
1. Using some third party tools:
If the particular address is a part of your blockchain.info HD wallet, follow these steps, otherwise ignore it.
(You must have your Recovery phrase/Seed before proceeding)
First, You must get it's private key
Download this and run it offline: https://github.com/iancoleman/bip39. Paste your seed there and you will see your address/es and its corresponding private keys at the "Derived Addresses" section. To toggle between accounts, Change the number on the "account" field where 0 is your default account, it means your 2nd account will be "1" and the 3rd will be "2" and so on.. (Use Ctrl+F to easily find the address you want)
Lastly, Download this and run it offline: https://github.com/OrdinaryDude/offline-bitcoin-signer. Paste the private key, enter your message and hit "Sign"
P.S. I tested this and verified the signature through coinig
(You must have your Recovery phrase/Seed before proceeding)
First, You must get it's private key
Download this and run it offline: https://github.com/iancoleman/bip39. Paste your seed there and you will see your address/es and its corresponding private keys at the "Derived Addresses" section. To toggle between accounts, Change the number on the "account" field where 0 is your default account, it means your 2nd account will be "1" and the 3rd will be "2" and so on.. (Use Ctrl+F to easily find the address you want)
Lastly, Download this and run it offline: https://github.com/OrdinaryDude/offline-bitcoin-signer. Paste the private key, enter your message and hit "Sign"
P.S. I tested this and verified the signature through coinig
2. Importing it in another wallet and signing a message there. I recommend electrum for that
Using your seed/backup phrase:
Tutorial: https://bitcoinelectrum.com/restoring-your-standard-wallet-from-seed
*When electrum prompts you to enter your seed, Click options and tick the BIP39 Seed Box
*When electrum prompts you to enter your seed, Click options and tick the BIP39 Seed Box
*Please note that when importing, your funds will be accessible on both wallets which is why it's highly advisable to transfer them in a new wallet (with different seed/PK's) once the network has stabilized to avoid high fees.
Here's a tutorial to sign a message in electrum: https://www.cryptocompare.com/wallets/guides/how-to-sign-a-message-with-electrum
You can also import just one address using its private key. Use the iancoleman bip39 tool for deriving your PK's as mentioned above
Guide: https://bitcoinelectrum.com/importing-your-private-keys-into-electrum