Question

(a) Let E be an encryption function and A a function that can be used to...

(a) Let E be an encryption function and A a function that can be used to compute a
message authentication code. Let x be a message. Alice computes E(A(x)jx) and
sends it to Bob. Is this an example of encrypt-and-MAC, encrypt-then-MAC or
MAC-then-encrypt?
(b) Let E be an encryption function and A a function that can be used to compute a
message authentication code. Let x be a message. Alice computes E(x)jA(x) and
sends it to Bob. Is this an example of encrypt-and-MAC, encrypt-then-MAC or
MAC-then-encrypt?
(c) Which of the following functions is negligible:
1/ 2n;1/2log n ;1/nlog n :
(d) Which of the following functions is not negligible:
1/2n ;1/ n-1/2n ; n/n2

Math   Calculus   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

(c) can be solved by comparing one function with others

(d) can be solved by comparing one function with others

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Let S = {A, B, C, D, E, F, G, H, I, J} be the set...
Let S = {A, B, C, D, E, F, G, H, I, J} be the set consisting of the following elements: A = N, B = 2N , C = 2P(N) , D = [0, 1), E = ∅, F = Z × Z, G = {x ∈ N|x 2 + x < 2}, H = { 2 n 3 k |n, k ∈ N}, I = R \ Q, J = R. Consider the relation ∼ on S given...
Use python language please #One of the early common methods for encrypting text was the #Playfair...
Use python language please #One of the early common methods for encrypting text was the #Playfair cipher. You can read more about the Playfair cipher #here: https://en.wikipedia.org/wiki/Playfair_cipher # #The Playfair cipher starts with a 5x5 matrix of letters, #such as this one: # # D A V I O # Y N E R B # C F G H K # L M P Q S # T U W X Z # #To fit the 26-letter alphabet into...
It is about C++linked list code. my assignment is making 1 function, in below circumstance,(some functions...
It is about C++linked list code. my assignment is making 1 function, in below circumstance,(some functions are suggested for easier procedure of making function.) void search_node(struct linked_list* list, int find_node_ value) (The function to make) This function finds the node from the list that value is same with find_node_value and count the order of the node. This function should print message “The order of (node_value) is (order).” and error message “Function search_node : There is no such node to search.”....
R Code Directions: All work has to be your own, you may not work in groups....
R Code Directions: All work has to be your own, you may not work in groups. Show all work. Submit your solutions in a pdf document on Moodle. Include your R code (which must be commented and properly indented) in the pdf file. Name this pdf file ‘your last name’-HW5.pdf. Also submit one text file with your R code, which must be commented and properly indented. You may only use ‘runif’ to generate random numbers; other random number generating functions...
In which order the following ‘arguments’ of the foo() function will be put on the stack...
In which order the following ‘arguments’ of the foo() function will be put on the stack (the left-most variable has the highest memory address and the right-most variable has the lowest memory address)? void foo(int d, int s, string x, int e) d, s, x, e. e, x, s, d. x, d, s, e. d, s, e, x. To execute an external command from inside a program, either of the ‘system()’ or ‘execve()’ functions can be used. Select ALL of...
write a code in python Write the following functions below based on their comments. Note Pass...
write a code in python Write the following functions below based on their comments. Note Pass is a key word you can use to have a function the does not do anything. You are only allowed to use what was discussed in the lectures, labs and assignments, and there is no need to import any libraries. #!/usr/bin/python3 #(1 Mark) This function will take in a string of digits and check to see if all the digits in the string are...
Programming Exercise 2: implement the member function moveToNth(...) that removes the item marked by the cursor...
Programming Exercise 2: implement the member function moveToNth(...) that removes the item marked by the cursor and inserts it as the nth element of the list; test your implementation by turning the flag LAB3_TEST2 from 0 to 1 in config.h; - Programming Exercise 3: implement the ListArray member function find(...) that searches for the element given as a parameter; the search starts at the cursor and stops when it finds the element or at the end of the list; the...
You will write a program that loops until the user selects 0 to exit. In the...
You will write a program that loops until the user selects 0 to exit. In the loop the user interactively selects a menu choice to compress or decompress a file. There are three menu options: Option 0: allows the user to exit the program. Option 1: allows the user to compress the specified input file and store the result in an output file. Option 2: allows the user to decompress the specified input file and store the result in an...
please can you make it simple. For example using scanner or hard coding when it is...
please can you make it simple. For example using scanner or hard coding when it is a good idea instead of arrays and that stuff.Please just make one program (or class) and explain step by step. Also it was given to me a txt.htm 1.- Write a client program and a server program to implement the following simplified HTTP protocol based on TCP service. Please make sure your program supports multiple clients. The webpage file CS3700.htm is provided. You may...
Complete this in C++ and explain what is being done. 1      Introduction The functions in the...
Complete this in C++ and explain what is being done. 1      Introduction The functions in the following subsections can all go in one big file called pointerpractice.cpp. 1.1     Basics Write a function, int square 1(int∗ p), that takes a pointer to an int and returns the square of the int that it points to. Write a function, void square 2(int∗ p), that takes a pointer to an int and replaces that int (the one pointed to by p) with its...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT