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Yanka [14]
2 years ago
14

Holly the Hacker has a list of 100,000 common passwords. She wants to use this list to break into UNIX-like systems that use a p

assword file with lines consisting of:
Computers and Technology
1 answer:
egoroff_w [7]2 years ago
4 0

The question is incomplete. The complete question is :

Holly the Hacker has a list of 100,000 common passwords. She wants to use this list to break into UNIX-like systems that use a password file with lines consisting of:

The user's ID in plaintext.

10 bits of randomly chosen "salt," in plaintext.

The user's password, concatenated with the salt, and then encrypted.

There are very many such systems around the world, and Holly plans to steal the password files from as many as she can. The average system has 50 users in its password file.

Holly wants to create a master list of the encrypted versions of all the 100,000 passwords on her list, encrypted with all possible salt values. To create this master list, approximately how many encryptions of a password-concatenated-with-salt would Holly have to perform?

A. 2 million

B. 5 million

C. 100 million

D. 1 million

Solution :

It is given that the hacker, Holly wants break into the  UNIX-like systems using 100,000 common passwords that she has on her list. The system has at an average of 50 users in the password files.

Therefore, to create a master list, Holly have to perform about 50 x 100,000 = 5,000,000 encryptions for the password concatenated-with-salt.

Thus the correct option is option (B).  5 million

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Answer:

This solution is provided in C++

#include <iostream>

using namespace std;

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   double sum = 0.0;

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       for(int j = 0;j<6;j++){

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   return sum;

}

void printFancyArray(double myarr[][6]){

   for(int i = 0;i<2;i++)    {

       for(int j = 0;j<6;j++){

       cout<<myarr[i][j]<<" ";    

       }

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Explanation:

This function returns the sum of the array elements

double sumFancyArray(double myarr[][6]){

This initializes sum to 0

   double sum = 0.0;

This iterates through the row of the array

   for(int i = 0;i<2;i++)    {

This iterates through the column

       for(int j = 0;j<6;j++){

This adds each element

       sum+=myarr[i][j];    

       }}    

This returns the sum

   return sum;

}

This method prints array elements

void printFancyArray(double myarr[][6]){

This iterates through the row of the array

   for(int i = 0;i<2;i++)    {

This iterates through the column

       for(int j = 0;j<6;j++){

This prints each array element

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       }

   }

}

The main starts here

int main(){

This declares and initializes the array

   double myFancyArray[2][6] = {23, 14.12, 17,85.99, 6.06, 13, 1100, 0, 36.36, 90.09, 3.145, 5.4};

This calls the function  that returns the sum

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This calls the function that prints the array elements

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Download cpp
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