a) Assuming the output of the first application (round) of fK of S-DES is XXXXXXXXXXand K2 is XXXXXXXXXX, what is the output ciphertext? Show your calculation. b) Selected any 64 bits binary key for...

a) Assuming the output of the first application (round) of fK of S-DES is 00101011 and K2 is 10111001, what is the output ciphertext? Show your calculation. b) Selected any 64 bits binary key for standard DES. Calculates sub key k1 for round1 of DES.