<prompt> Translate the following text to EnglishIli kufanya hivyo, tunahitaji kujua kama mfumo wa saini ya elektroniki hutoa uhakika wa kutosha kwamba saini inayotokana na mfumo ni ya kipekee kwa saini, chini ya udhibiti wa saini.  <response>: To do this, we determine whether the electronic signature system provides reasonable assurance that the signature produced by the system is 1 unique to the signer, 2 under the signers sole control, 