digital signature
noun /ˌdɪdʒɪtl ˈsɪɡnətʃə(r)/
/ˌdɪdʒɪtl ˈsɪɡnətʃər/
(computing- a process that guarantees that the contents of a message have not been altered in the process of sending and delivering the message
compare electronic signature数字签名