digital signature

noun

UK /ˌdɪdʒ.ɪ.təl ˈsɪɡ.nə.tʃər/

US /ˌdɪdʒ.ɪ.t̬əl ˈsɪɡ.nə.tʃɚ/

A digital signature is a special computer code that proves a message or file really came from the person who sent it.

The bank checked the digital signature to make sure the email was really from the customer.

SYNONYMS

electronic signature e-signature cryptographic signature digital seal

RELATED WORDS

encryption authentication certificate hash security

OTHER MEANINGS

2. A handwritten-style mark added electronically to a document to show approval.

She added her digital signature to the contract on her tablet.

3. A mathematical value attached to data that lets a computer verify the data has not been changed.

The software rejected the download because its digital signature did not match.

4. A legal method of signing documents online that is accepted in many countries.

The company uses a digital signature service to sign deals remotely.