Glossary term · S
Digital Signature
Definition
A digital signature is a technical implementation of electronic signature based on asymmetric cryptography. It consists of encrypting the hash of a document with the signatory''s private key, producing a fingerprint verifiable by anyone with the corresponding public key (contained in the certificate). It guarantees both the signatory''s identity and document integrity.
Frequently asked questions
What is a digital signature?
It is a technical implementation of the electronic signature based on asymmetric cryptography.
What does a digital signature technically rely on?
It encrypts a document's hash with the signer's private key, producing a fingerprint that anyone holding the matching public key — contained in the certificate — can verify.
What is the difference between a digital signature and an electronic signature?
Electronic signature is the broad legal notion defined by eIDAS; digital signature is a specific technical implementation of it, based on asymmetric cryptography and hashing.
What does a digital signature guarantee?
It guarantees both the signer's identity and the integrity of the signed document.
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