UPSC 2019: Consider the following statements. A digital signature is 1. an electronic record that identifies the certifying authority issuing it 2. used to serve as a proof of identity of an individual to access information or server on Internet 3. an electronic method of signing an electronic document and ensuring that the original content is unchanged Which of the statements given above is/are correct?

A digital signature is an electronic cryptographic method that binds a signer’s identity to a document and guarantees integrity; if the content changes, the signature breaks (statement 3 correct). The electronic record identifying a certifying authority is called a Digital Certificate, not the signature itself (statement 1 wrong). Digital signatures are used to authenticate documents, not chiefly to log into servers (statement 2 wrong). Hence only statement 3 is correct. ([edukemy.com](https://edukemy.com/blog/upsc-prelims-2019-question-94/?utm_source=openai))