Question

In: Advanced Math

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


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
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...
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).
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...
using C language Create a bitwise calculator that ask user for input two input, first int,...
using C language Create a bitwise calculator that ask user for input two input, first int, bitwise operation, second int (i.e 5 & 9) only those bitwise operation are allowed: & ~ ^ | << >>. If user uses wrong operators stop program and ask again. Convert the first int and second int into 8 BITS binary (00000000) and use bitwise operator given by user to either AND, OR, XOR, etc (ie 1001 & 1111)
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?
[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:...
C++ Text message decoder Use getline() to get a line of user input into a string:...
C++ Text message decoder Use getline() to get a line of user input into a string: Enter text: IDK if I'll go. It's my BFF's birthday. Search the string using find() for common abbreviations and replace() them with their long form. In addition, use a for loop to iterate through each character of the string and replace any occurences of '.' with '!': Enter text: IDK if I'll go. It's my BFF's birthday. I don't know if I'll go! It's...
Let a, b, c ∈ Q, (a, b) /= (0, 0), and consider the line L...
Let a, b, c ∈ Q, (a, b) /= (0, 0), and consider the line L = {(x, y) ∈ R2 ; ax + by = c}. State and prove a criterion in terms of the data a, b, c ∈ Q to check whether L∩Z2 = ∅, i.e., the line passes through no point with integer coordinates in the plane. Give an explicit example of such a line that is neither parallel to the x-axis nor to the y-axis!
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
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT