user A sends two messages to user B using ElGamal. user C listens on the line...

user A sends two messages to user B using ElGamal. user C listens on the line and intercepts both messages, and got the decryption of the first message. explain well if user C can decrypt the second message as well:

1)user A sends two messages E(m) and E(m'). to encrypt the first message user A used the variable k and to encrypt the second k+5. User C knows that there's a difference of 5 between the k values chosen. can he recover the second message?

2)user A sends two messages E(m) and E(m'). to encrypt the first message user A used the variable k and to encrypt the second 2k. User C knows that the second k used is two times the first k used. can he recover the second message?

please explain mathematically and elaborate so i can understand and learn from your answer. thank you very much.

Solutions

Expert Solution

Colby Messinger answered 1 year ago

Next > < Previous

Related Solutions

37.Nonverbal messages A.are better than verbal messages. B.are a good medium for expressing ideas precisely. C.indicate...

37.Nonverbal messages A.are better than verbal messages. B.are a good medium for expressing ideas precisely. C.indicate a person’s feelings and attitudes. D.are unambiguous

Write a C++ code using while loop which is getting the two integers from the user,...

Write a C++ code using while loop which is getting the two integers from the user, and output how many numbers are multiples of 5, and how many numbers are multiples of 7 between the two integers (inclusive).

Consider a scenario where Host A and Host B want to send messages to Host C....

Consider a scenario where Host A and Host B want to send messages to Host C. Hosts A and C are connected by a channel that can lose and corrupt (but not reorder) messages. Hosts B and C are connected by another channel (independent of the channel connecting A and C) with the same properties. The transport layer at Host C should alternately deliver M (M>1) consecutive messages received from A to its application layer and N (N>1) consecutive messages...

Part B) Write a C++ program which prompts user to choose from the two alternative funtions...

Part B) Write a C++ program which prompts user to choose from the two alternative funtions specified below, each of which passes a random number between 1 and 4 and returns a random message. The two functions are: Function messageByValue that passes a random value between 1 and 4 and returns the message by value and Function messageByReference that passes a random value between 1 and 4 and returns the message by reference. Each function returns one of four random...

[C#] Randomly generate two numbers that user chooses and then ask the user what the answer...

[C#] Randomly generate two numbers that user chooses and then ask the user what the answer is when some operator is applied. If user is correct, they will be congratulated. If they are wrong, they will be given the correct answer. This should be repeated based on how many times is chosen by user. I have the code which will do the following below: User wants to know the answer to x % y, What is smallest value of x:...

You and a friend are using the C(7,4) Hamming code to send some 4-bit messages to...

You and a friend are using the C(7,4) Hamming code to send some 4-bit messages to each other. (a) You encode the message 1010 and send the encoded 7-bit sequence to your friend, who receives 1011011. How many errors were introduced during transmission? (b) You subsequently receive the encoded sequence 0111011 from your friend. Assuming at most one error, what is the 4-bit message that your friend sent?

a. Create a scatterplot b. Find the least -squares line c. Plot the line on the diagram

Using the following data. X Y 3 6 6 10 9 15 12 24 15 21 18 20 a. Create a scatterplot b. Find the least -squares line c. Plot the line on the diagram d. Predict: Y if X is 10 Y if X is 17

A. Write a C++ with a menu (using switch) that asks the user to select one...

A. Write a C++ with a menu (using switch) that asks the user to select one of the following choices to the user: 1. Options ‘S’ or ‘s’ 2. Option ‘T’ or ‘t 3. Options ‘P’ or ‘p’ 4. print in the Matrix format B. When 1 is selected, prompt the user to enter the starting value st (int value). Use a single FOR loop to count numbers from 1 to st. When the loop is finished, find the average...

Using C++ Create a program that asks the user to input a string value and then...

Using C++ Create a program that asks the user to input a string value and then outputs the string in the Pig Latin form. - If the string begins with a vowel, add the string "-way" at the end of the string. For “eye”, it will be “eye-way”. - If the string does not begin with a vowel, first add "-" at the end of the string. Then rotate the string one character at a time; that is, move the...

Write a program in c++ using only if statements that prompts the user to enter an...

Write a program in c++ using only if statements that prompts the user to enter an integer for today’s day of the week (Sunday is 0, Monday is 1 …., and Saturday is 6) then displays today. Also, prompt the user to enter the number of days after today for a future day and display the future day of the week. The future day can be computed as follows: (today + number of days after today) % 7 Sample run...

Subjects