Let n = pq, where p and q are distinct odd primes. Define X(n): (p-1)(q-1) = gcd(p-1,q-1)* Suppose that we modify the RSA cryptosystem by requiring that ab = 1 (mod X(n)). (a) Prove that encryption and decryption are still inverse operations in this modified cryp- tosystem.

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Let n=pq, where p and q are distinct primes.

Let n =
= pq, where p and q are distinct odd primes. Define
X(n) =
(p-1)(q-1)
gcd(p-1,q-1)
Suppose that we modify the RSA cryptosystem by requiring that ab = 1 (mod X(n)).
(a) Prove that encryption and decryption are still inverse operations in this modified cryp-
tosystem.
Transcribed Image Text:Let n = = pq, where p and q are distinct odd primes. Define X(n) = (p-1)(q-1) gcd(p-1,q-1) Suppose that we modify the RSA cryptosystem by requiring that ab = 1 (mod X(n)). (a) Prove that encryption and decryption are still inverse operations in this modified cryp- tosystem.
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