We can "sign" something by entering our name into a text box on a web form. That's the easiest to reproduce. This works because the contract is between the othe

We can "sign" something by entering our name into a text box on a web form. That's the easiest to reproduce. This works because the contract is between the other party (requestor) and the named person. Entry by any other party not authorized by the signer will render the contract null and void. The signature answers the question of, "Does X agree to these terms or not?" and not, "Is X who they say they are?"