# digital certificate

CEFR C1 · Compound

Source: https://englishreference.com/word/digital-certificate
Updated: 2026-07-22

## Definition

an electronic file that proves who you are or that a website is safe. It works like a digital passport to keep your information secure when you use the internet.

For teachers: an electronic document used to prove the ownership of a public key. It contains information about the identity of the owner and the digital signature of an entity that has verified the certificate's contents.

## Examples

- The website is secure because it has a valid digital certificate.
- When the browser warned that the digital certificate had expired, the user decided not to enter their credit card details.
- By using a digital certificate issued by a trusted authority, the company ensures that all data transmitted between the server and the client remains encrypted and authenticated.

## Usage notes

- Often used in technical contexts regarding cybersecurity and web browsing; frequently paired with the verbs 'issue', 'verify', or 'revoke'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.