# Public key Authentication Problem

Think of RSA Full-Domain Hash (RSA-FDH) signature scheme.

How would you - prove that RSA-FDH is Existentially Unforgeable against a Known Message Attack (KMA). - prove that RSA-FDH is Existentially Unforgeable against a Chosen Message Attack (CMA).

In each of the proof, an outline of the proof-idea is enough. Rigorous mathematical proofs are not required but will be appreciated.

Note by Raja Metronetizen
2 years, 1 month ago

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I do not remember these terms that well. @Sharky Kesa @Pi Han Goh any idea?

Staff - 2 years, 1 month ago

I got no idea at all. Cryptography is not really my forte.

- 2 years, 1 month ago

Nope. No idea.

- 2 years, 1 month ago