u Consider the ElGamal encryption Parameters: a prime p, a generator g, a random number u, let y=gu mod p. Public key: p
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u Consider the ElGamal encryption Parameters: a prime p, a generator g, a random number u, let y=gu mod p. Public key: p
k = 4.
a. Find all possible generators.
b. Find the public key and secret key.
c. Encrypt the message M = 7.
d. Decrypt the corresponding ciphertext.
u Consider the ElGamal encryption Parameters: a prime p, a generator g, a random number u, let y=gu mod p. Public key: p, g, y Secret key: p, g, u Encryption of message M: Choose a random number k<p-1 - Let a=gk mod p, b= M*yk mod p. = p, - The ciphertext is (a,b)