Cryptography

Explain the encryption operation in the RSA cryptosystem. Determine a trapdoor function and describe the trapdoor function used in RSA. Of the three values n_1 = 445, n_2 = 1335, and n_3 = 503, which is a valid modulus for use in RSA? (Assume here that their small size is not an issue; concern yourself only with which one is properly constructed.) Explain what disqualifies the two bad values