Hello guy, let's say someone sent me his private key.
is there any way to secure the bitcoin, don't let him to use the bitcoin on the shared private key?
without making a new transaction to the new wallet?
-- no hacking its just security question
Thanks
A private key could be encrypted as is done with paper wallets. But it would be very wise to do this with a freshly generated private key, not one that had an unknown history.