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talk about this one here existential forgery attack on signatures so were going to generate an rsa key and then sign a message with an rsa signature and then show how you can forge messages that match a known signature when i see a personal message i think ah i see yeah good yeah i figured out who it was uh woot i think let me check ill make another all right good all right so lets uh so lets do some of this and im going to shove the instructions to the side and bring up the command prompt and do it and well see how it goes so let me find my shell okay and get out of here all right so the first thing im going to do is generate rsa key pair so you can do that this way you can use open ssl generate rsa and im going to make a 512-bit key which is the link they originally recommended back in the 70s which is no longer considered very secure but its good enough for us to just practice with so this made it chose e to be 65 537 remember e is used to encrypt and d to decrypt and every