☑Kizspy. me Q7 (1 point). Using the same RSA parameters from Q6, with p = 11, q = 17, e = 3, and
the private key d = 227, what is the ciphertext C when encrypting the message M = 5?
Q8 (1 point). In an RSA cryptosystem with p=11, q=17, and e = 3, an attacker
performs a chosen-ciphertext attack. If the attacker has ciphertext 10 and wants to find
the corresponding plaintext, they compute c' = c*r^e mod n and choose r = 2. If the new
ciphertext c' = 80, and the corresponding decryption is 120, what is the plaintext
corresponding to the original ciphertext 10?
Q9 (1 point). Alice and Bob use Diffie-Hellman Key Exchange with a common prime p
= 19 and primitive root g = 2. If Alice has a public key Y_A = 7, what is her private key
X_A?
Q10 (1 point). There are 8 computers (hardware). Each computer hosts 5 virtual
machines (VM) with different addresses, and each VM hosts 3 applications. How many
key exchange sessions (in one session, two logical parties share a key) are needed if the
decentralized key distribution is used so that all VMs share pairwise keys?
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