Question: Solve all parts a,b,c & d step by step Determine the size of the key space for the following ciphers: (a) A shift cipher with

Solve all parts a,b,c & d step by step

Solve all parts a,b,c & d step by step Determine the size

Determine the size of the key space for the following ciphers: (a) A shift cipher with modulus m=500. (b) An affine cipher with modulus m=12103. HINT: Find the prime factors of m by trial-and-error division starting with small primes. Note that some factors may occur more than once. (c) A substitution cipher with m=50. (d) A Vigenre cipher with modulus m=80 and block size n=12

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