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Alice and Bob communicate over an insecure network and want to securely exchange information. They decided to use a Caesar cipher for encryption and the
Alice and Bob communicate over an insecure network and want to securely exchange information. They decided to use a Caesar cipher for encryption and the DiffieHellman key exchange for secure key generation. Alice and Bob decide to use the DiffieHellman key exchange to generate a shared secret key for decrypting their messages. Figure shows the numerical representation of the alphabet. aIf Alice chooses a private key a and Bob chooses a private key b and the agreedupon base g with a prime modulus p Compute the shared secret key for Bob and Alice. bDecrypt the following encrypted terms. iDVC iiUOBLOBYC iii.WPK ivFSBEC vSZ cExplain each of the decrypted terms in b Marks Marks Marks dExplain how the DiffieHellman key exchange is vulnerable to a maninthemiddle attack. Marks eProvide TWO possible solutions to overcome the vulnerability of the Diffie Hellman key exchange to maninthemiddle attacks.
Alice and Bob communicate over an insecure network and want to securely exchange
information. They decided to use a Caesar cipher for encryption and the DiffieHellman
key exchange for secure key generation. Alice and Bob decide to use the DiffieHellman
key exchange to generate a shared secret key for decrypting their messages. Figure
shows the numerical representation of the alphabet.
aIf Alice chooses a private key a and Bob chooses a private key b and the agreedupon base g with a prime modulus p Compute the shared secret key for Bob and Alice.
bDecrypt the following encrypted terms.
iDVC
iiUOBLOBYC
iii.WPK
ivFSBEC
vSZ
cExplain each of the decrypted terms in b
Marks
Marks
Marks
dExplain how the DiffieHellman key exchange is vulnerable to a maninthemiddle attack.
Marks
eProvide TWO possible solutions to overcome the vulnerability of the Diffie Hellman key exchange to maninthemiddle attacks.
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