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Maslowich
3 years ago
9

Describe how asymmetric encryption is used to send a message from User A to User B that assures data confidentiality, authentica

tion, and integrity. Be specific as to the keys used and how they achieve the three goals.
Computers and Technology
1 answer:
daser333 [38]3 years ago
8 0

Answer:

Find the explanation below.

Explanation:

Asymmetric encryption is a system of communication in technology between two parties where keys which are variable values coined by an algorithm are used to encrypt and decrypt the messages between the sender and receiver. The two types of keys used in this process are the public and private keys. The public keys can be used by anyone to encrypt messages which are then sent to the receiver who decrypts the message using his private keys. The private keys on the other hand are only shared by the person who first set up the key. In sending messages this way, the receiver's public key is gotten from a public directory, and the message encrypted by the sender. The receiver can then decrypt the message using his private keys. But if the message is encrypted using a private key, it is decrypted by the receiver with a public key.

The one-way nature of this style of communication ensures data integrity and confidentiality since users are not required to disclose their keys and only the two parties can access the message. The two end users also preserve the right to authenticate the keys. The transport layer security protocol makes use of asymmetric encryption.

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Given an array as follows
slava [35]

Answer:

1) Method calcTotal:

  1. public static long calcTotal(long [][] arr2D){
  2.        long total = 0;
  3.        
  4.        for(int i = 0; i < arr2D.length; i++ )
  5.        {
  6.            for(int j = 0; j < arr2D[i].length; j++)
  7.            {
  8.                total = total + arr2D[i][j];
  9.            }
  10.        }
  11.        
  12.        return total;
  13.    }

Explanation:

Line 1: Define a public method <em>calcTotal</em> and this method accept a two-dimensional array

Line 2: Declare a variable, total, and initialize it with zero.

Line 4: An outer for-loop to iterate through every rows of the two-dimensional array

Line 6: An inner  for-loop to iterate though every columns within a particular row.

Line 8: Within the inner for-loop, use current row and column index, i and j, to repeatedly extract the value of each element in the array and add it to the variable total.

Line 12: Return the final total of all the element values as an output

Answer:

2) Method calcAverage:

  1. public static double calcAverage(long [][] arr2D){
  2.        double total = 0;
  3.        int count = 0;
  4.        
  5.        for(int i = 0; i < arr2D.length; i++ )
  6.        {
  7.            for(int j = 0; j < arr2D[i].length; j++)
  8.            {
  9.                total = total + arr2D[i][j];
  10.                count++;
  11.            }
  12.            
  13.        }
  14.        
  15.        double average = total / count;
  16.        
  17.        return average;
  18.    }

Explanation:

The code in method <em>calcAverage</em> is quite similar to method <em>calcTotal</em>. We just need to add a counter and use that counter as a divisor of total values to obtain an average.

Line 4: Declare a variable, count, as an counter and initialize it to zero.

Line 11: Whenever an element of the 2D array is added to the total, the count is incremented by one. By doing so, we can get the total number of elements that exist in the array.

Line 16: Use the count as a divisor to the total to get average

Line 18: Return the average of all the values in the array as an output.

Answer:

3) calcRowAverage:

  1. public static double calcRowAverage(long [][] arr2D, int row){
  2.        double total = 0;
  3.        int count = 0;
  4.        
  5.        for(int i = 0; i < arr2D.length; i++ )
  6.        {
  7.            if(i == row)
  8.            {
  9.                for(int j = 0; j < arr2D[i].length; j++)
  10.                {
  11.                    total = total + arr2D[i][j];
  12.                    count++;
  13.                }
  14.            }
  15.            
  16.        }
  17.        
  18.        double average = total / count;
  19.        
  20.        return average;
  21.    }

Explanation:

By using method <em>calcAverage </em>as a foundation, add one more parameter, row, in the method <em>calcRowAverage</em>. The row number is used as an conditional checking criteria to ensure only that particular row of elements will be summed up and divided by the counter to get an average of that row.

Line 1: Add one more parameter, row,

Line 8-15: Check if current row index, i, is equal to the target row number, proceed to sum up the array element in that particular row and increment the counter.

5 0
3 years ago
JAVA
Umnica [9.8K]

import java.util.Scanner;

public class JavaApplication58 {

   

   public static void main(String[] args) {

       Scanner scan = new Scanner(System.in);

       System.out.println("Enter a positive integer:");

       String num = scan.nextLine();

       for (int i = num.length()-1; i >=0; i--){

           System.out.println(num.charAt(i));

       }

       

   }

   

}

I hope this helps!

5 0
3 years ago
Where are the Add Level and Delete Level buttons located? Filter options list Sort &amp; Filter group Sort dialog box Custom fil
BaLLatris [955]

Answer:

Sort dialog box

Explanation:

Sort dialogue box is used to sort data in Excel.

The add level Adds another row to the dialog box so additional columns can be sorted while the delete level removes any unwanted level. How to access it: Press the down arrow beside the sort order tab. Tap the button "The Largest to Smallest". Tap the Add level button.

6 0
3 years ago
Which of the following symbols is a part of all spreadsheet functions?
NARA [144]

Answer:

the answer is B and is part of all spreadsheet functions

8 0
2 years ago
Read 2 more answers
Successful Web sites such as StumbleUpon ( www.stumbleupon) and Digg ( www.digg) use ____ by inviting their visitors to vote on
aliina [53]

Answer:

"Crowdsourcing" is the correct answer for the above question.

Explanation:

  • Crowdsourcing is a term from which any organization advertises the thinks or can get the ideas or solutions for any particular problem.
  • It is a term that refers to the problem to the number of solvers to achieve the result correct and frequent.
  • For example, If anyone wants to prepare the two websites. Then he assigns the works to the number of people and the works done faster with the help of this.
  • The above question states that some websites can be successful with the help of the type of work. They are successful with the help of crowdsourced work. Because it saves time. So the answer is Crowdsourcing.
3 0
3 years ago
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