digital signature

American  

noun

Digital Technology.

1. an encrypted digital code appended to an electronic document to verify that it was created by a known source and has not been altered.

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digital signature British  

noun

1. computing electronic proof of a person's identity involving the use of encryption; used to authenticate documents

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Etymology

Origin of digital signature

First recorded in 1975–80

Example Sentences

Hash matching is where media is given a unique digital signature which can be checked against hashes belonging to known content - in this case, databases of known CSAM.

From BBC • Dec. 16, 2024

Now, another potential defense is gaining traction: digital watermarking, or the insertion of an indelible, covert digital signature into every piece of AI-produced content so the source is traceable.

From Scientific American • Aug. 8, 2023

Some researchers are working on “watermarking”—creating an imperceptible digital signature in the AI’s output.

From Science Magazine • Apr. 10, 2023

The data is cryptographically sealed into the file; tampering with the image breaks the digital signature and prevents the credentials from appearing when using trusted software.

From New York Times • Apr. 8, 2023

When you share information from your license, the verifying device only checks to see whether the digital signature is valid — if so, your ID and the data on it are valid.

From Los Angeles Times • May 24, 2022