Question: An RSA cryptosystem has public key N = 35 and e = 7. Messages are encrypted one letter at a time, converting letters to numbers

An RSA cryptosystem has public key N = 35 and e = 7. Messages are encrypted one letter at a time, converting letters to numbers by A = 2, B = 3, ..., Z = 27, space = 28. (a) Showing your working, encrypt the message: BE GOOD. (b) Find the decryption exponent d and decrypt the message: 20 23 26 7 15 16 (c) This choice of N and e has several weaknesses - name at least two different ones

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