In the real world, when a message needs to be authenticated by an individual, it is written on paper, and then the individual signs the message. Therefore, it is known that this specific message belongs to a specific person. In the digital world, things can happen similarly: a piece of data (message) is created by an individual, and then the message is signed digitally with a specific signature by that individual. Digital signatures are an important ...
14. Signature Schemes
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