Assume that the ciphertext C is computed from the plaintext P by C= P ⊕ K1 ⊕ K2 , where K1 and K2 are the encryption key and ⊕ denotes the bitwise Xor operation. Also, we know that the ciphertext of P=5 is C=12. What is the encryption key?
a) 9
b) 10
c) 3
d) 0

Wich technology can a website use to allow you to listen to a concert live over the internet?

You need to design a circuit that implements the functions in the following table: s0 s1 function0 0 a + 10 1 a – b1 0 a + b1 1 a – 1s0 and s1 are 1-bit control inputs to select the function of the circuit. inputs a and b are 4-bitnumbers in 2s complement form. the output is also a 4-bit number in 2s complement form.you are allowed to use only one ttl 7483 4-bit adder to implement all the functions. but anynumber of other components (except the adder) can be used.hint: design a combinational logic circuit to modify the input b and the “carry input” of theadder depending on the control inputs s0 and s1.important: lab grade will depend on the working of the circuit & will be checked of by your labinstructor.1. is the output valid for the following input combinations: a. s0 = 0, s1 = 0, a = 7, b = 3? b. s0 = 0, s1 = 1, a = 7, b = 3? c. s0 = 1, s1 = 0, a = -4, b = -5? d. s0 = 1, s1 = 1, a = -8, b = 6? 2. what is the range of inputs (for both a and b) that will produce the valid output for all the functions?

How are we able to create photographs differently than 100 years ago? explain your answer in relation to your photograph you selected.