Secure authentication method for documents.

a public-key cryptosystem and Federal Information Processing Standard for digital signatures, based on the mathematical concept of modular exponentiation and the discrete logarithm problem.

In cryptography, the Elliptic Curve Digital Signature Algorithm offers a variant of the Digital Signature Algorithm which uses elliptic-curve cryptography.

A BLS digital signature, also known as Boneh–Lynn–Shacham, is a cryptographic signature scheme which allows a user to verify that a signer is authentic.

In a cryptographic digital signature or MAC system, digital signature forgery is the ability to create a pair consisting of a message, , and a signature (or MAC), , that is valid for , but has not been created in the past by the legitimate signer.