User A and B use RSA algorithm to communicate over a secure channel. User A uses the prime numbers p = 31, q = 43, and e = 17 to generate his public and private keys. What is the public key of user A? What is the private key of A? What does user B need to perform encryption? Encrypt the message M = 130 to obtain the ciphertext C. Decrypt C to obtain the plaintext M.

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A: Answer is  Caesar cipher

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A: The ciphertext is been decrypted below

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A:

Q: RSA cryptosystem

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A:

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