Hi folks. I do not have a hardware wallet at the moment, only an Online wallet with Blockchain.info
Does any of you know if it is possible to sign a message for non imported addresses there? Has anyone done it before on Blockchain.info?
Thanks for your help.
I assume by non-imported address it is an address where you import the private key.
You can't sign a valid message from an address if you don't own the private key. So you have to "import" the private key on blockchain.info. You can use software like Electrum to sign your message, it's more secure than blockchain.info.