Question: (b) The ciphertext (21,10,5,14) was encrypted using an affine cipher modulo 26 . The first symbols of the plaintext are 2 and 11 . Find

. Find the encryption function. x=9211fon(21,10,5,14) tin i) (c) For the problem

(b) The ciphertext (21,10,5,14) was encrypted using an affine cipher modulo 26 . The first symbols of the plaintext are 2 and 11 . Find the encryption function. x=9211fon(21,10,5,14) tin i) (c) For the problem in (b), find the decription function (you may use the fact that 19111(mod26)). Encryption function: 91x+21=y 9fuxtionis911x+9211=y+x=11211 911x=y921199y211911x=9

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