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Computers and Technology, 04.12.2019 05:31 kaylabjoyner4023
Design a semantically secure encryption scheme to be used by two english literature scholars, william and mary. being literature scholars, william and mary only use english characters plus space, comma and period (53 characters in all). furthermore, wiliam and mary insist that ciphertexts will only consist of the same
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Computers and Technology, 22.06.2019 23:50
You need to design a circuit that implements the functions in the following table: s0 s1 function0 0 a + 10 1 a β b1 0 a + b1 1 a β 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 βcarry inputβ 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?
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