S/MIME encryption also uses a key-based approach, but it has some significant advantages in convenience and security. S/MIME uses certificates, which are similar to keys. The public portion of each certificate is held by the sender of a message and by one of several certificate authorities, who are paid to guarantee the identity of the sender and the security of the message. Evolution already recognizes a large number of certificate authorities, so when you get a message with an S/MIME certificate, your system automatically receives the public portion of the certificate and decrypts or verifies the message.
S/MIME enkriptatzeak tekletan oinarritutako hurbilketa bat ere erabiltzen du; abantaila batzuk eskaintzen ditu komenigarritasun eta segurtasun aldetik. S/MIMEk ziurtagiriak erabiltzen ditu, gakoen antzekoak. Ziurtagiri bakoitzaren zati publikoa mezuaren bidaltzaileak eta Ziurtagiri-emaileren batek daukate; konprometituta daude bidaltzailearen identitatea eta mezuaren segurtasuna bermatzeko. Evolution-ek ziurtagiri-emaile ugari ezagutzen ditu; beraz, S/MIME ziurtagiria duen mezu bat jasotzean, zure sistemak automatikoki jasoko du ziurtagiriaren zati publikoa, eta mezua desenkriptatu edo egiaztatuko du.