Digital signature forgery
From Wikipedia, the free encyclopedia
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. There are different types of forgery.[1]
To each of these types, security definitions can be associated. A signature scheme is secure by a specific definition if no forgery of the associated type is possible.