DIFFICULT MATLAB QUESTION The function m-file used to randomly generate the pass

Question

DIFFICULT MATLAB QUESTION

The function m-file used to randomly generate the password matrix. The password matrix is a numeric matrix where each element contains an integer number (** Notice: the number is not necessarily a single digit! **). The function file has been designed so that you will not have direct access to the password matrix itself; you can only access some limited tools to check your guess.

A template solution m-file script that you will complete as your solution submission. You may only change 2 specific areas of the template m-file:

Line #17, where you PW_Decode solution matrix is defined

The section starting at Line #28, where you are asked to insert your PW decoding procedure

Using these two documents, you are to design, write, and test a PW decoding procedure to determine what the correct PW matrix is.

TemplateSolution.m:

% Template Bonus Solution -------------------------------------------------
clear all
close all
clc

Time = zeros(1,10); % Vector containing 10 elapsed times to complete PW
% decode process

for T =1:10 % Repeat decode procedure for 10 DIFFERENT PW matrix

[Check1, Check2] = BonusPW();
% Generate the random Password matrix and returns
% the Parent function output
  
% *************************************************************************
% You can edit line #17 ===================================================
PW_Decode = []; % Your decoded PW matrix needs to be saved in
% the variable PW_Decode
% =========================================================================
% *************************************************************************
  
tic; % Start decode time stopwatch
  
while ~Check2(PW_Decode)
  
% *****************************************************************   
% Insert your solution code between HERE ==========================
for jj=1:4;for kk=1:500;Matrix(jj,kk)=PW_Decode(jj,kk);end;end
% and HERE ========================================================
% *****************************************************************
  
end
  
Time(T) = toc; % Stop decode time stopwatch
end

MeanT = mean(Time); % Average time of PW matric decode process

disp(['Individual Decode Times: ' num2str(Time)]);
disp(['Average Decode Time: ' num2str(MeanT)]);

Function File:

function [CheckElement, CheckPW] = BonusPW()

PW = zeros(4,500);

PW(1,:) = randperm(1000,500) - 1; % Lines 5 - 8 randomly generate the
PW(2,:) = randperm(1000,500) - 1; % numeric password matrix, PW
PW(3,:) = randperm(1000,500) + 250;
PW(4,:) = randperm(1000,500) - 2000;
  
CheckElement = @isElement; % CheckElement is a handle to child
% function isElement()
  
CheckPW = @isPW; % CheckPW is a handle to the child
% function isPW()
  
function Correct = isElement(Guess, numPW, Index)
% This child function checks whether a scalar integer Guess is
% equal to a specific element contained in PW
  
Correct = false;
if size(Guess == [1,1])
if PW(numPW,Index) == Guess
Correct = true;
end
end
end

function Correct = isPW(Guess)
  
Correct = false;
  
if size(Guess) == size(PW)
if PW == Guess
Correct = true;
end
end
end

end

Please EXPLAIN your solution if you find one!

Thanks

Explanation / Answer

The function file I provided generates a password.The script file will edits the lines 17 and 28. Line 17 will says PW_Decode = [].the randomly generated passwords mean that guesses are made. So,by editing the line pwd guess and By editing the lines 17 and 28 we can be able to "crack" the randomly generated password made by the function file.

Related Questions

Navigate

• Browse (All)
• Browse D
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.