Alice and Bob are using the EIGamal cipher with 199 and a 3. the parameters p = = Their parameters are small and we decide to crack the cipher. = Suppose Alice is observed sending public ephemeral 103 and Bob sends public key = 136. key KE

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Alice and Bob are using the ElGamal cipher with
the parameters p = 199 and a = 3.
Their parameters are small and we decide to crack the
cipher.
Suppose Alice is observed sending public ephemeral
key k = 103 and Bob sends public key = 136.
ß
Alice is observed transmitting the ciphertext y = 68.
a) What is the masking key km?
b) What is the plaintext?
Transcribed Image Text:Alice and Bob are using the ElGamal cipher with the parameters p = 199 and a = 3. Their parameters are small and we decide to crack the cipher. Suppose Alice is observed sending public ephemeral key k = 103 and Bob sends public key = 136. ß Alice is observed transmitting the ciphertext y = 68. a) What is the masking key km? b) What is the plaintext?
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