A digital signature allows recipients to verify that the message was sent by you and its content was not changed. Encrypted messages are always signed by default.
Azmul umḍin ad yeǧǧ iɣerwaḍen ad sneqden belli izen yettwazen-d sɣur-k·m daɣen agbur-is ur yettwabeddel ara. Iznan iwgelhanen ttwaszemlen s wudem awurman.