Write the pseudo-code for a good reduction function r

Assignment Help C/C++ Programming
Reference no: EM132103925

Problem : Time-Memory-Tradeof

We've seen the Time-Memory-Tradeoff (TMTO) of hash chains and rainbow tables used to efficiently attack many wireless (and wired) systems. In this question, we'll explore TMTO in a bit more practical detail.

(a) Hash chain reduction functions map hashes back into the pre-image space. Can there be collision of the reduction function output? I.e. is there an X and X0 such that R(X) = R(X0 )? Explain your answer.

(b) Assume that the pre-image space is 8 bytes of ASCII. Write the pseudo-code for a good reduction function R() in this problem scenario. Explain any relevant details of your function R().

(c) Assume that the pre-image space is 8 bytes (where each byte can take on any value, not just ASCII). Write the pseudo-code for a good reduction function R( ) in this problem scenario. Explain any relevant details of your function R( ).

Reference no: EM132103925

Questions Cloud

How can an attacker find the three keys with effort : How can an attacker find the three keys with effort in the order of 2112 instead of 2168? Describe the attack in detail.
Briefly explain the purpose of the autn message : The security algorithms and protocols used are negotiated between the operator and the mobile station during authentication.
Calculate and display the total retail price of an item : Write pseudocode for a program that calculates and displays the total retail price of an item sold at a store.
Write an matlab function to solve a second-order polynomial : Write an MATLAB function (M-file) to solve a second-order polynomial. Solve mathematically and store the solutions in variables x1 and x2.
Write the pseudo-code for a good reduction function r : Write the pseudo-code for a good reduction function R() in this problem scenario. Explain any relevant details of your function R().
Design and simulate and verify a 16-bit ripple-carry adder : Design, simulate and verify a 16-bit ripple-carry adder by performing the following additions/subtractions (the values of a and b are given in decimal).
Degrees celsius and the air pressure : A child releases a 6.25L helium balloon in the parking lot of an amusement park where the temperature is 28.50 degrees
What is the most frequently observed byte : Examine the raw hex bytes of the GSM messages, especially the end of the messages. What is the most frequently observed byte.
What is the final temperature : a) ignoring the heat capacity of the calorimeter, what is the final temperature?

Reviews

Write a Review

C/C++ Programming Questions & Answers

  Write a program that asks the user for the name of a file

Write a program that asks the user for the name of a file. The program should display the content of the file on the screen.

  Determine the larger and smaller integers

Determine the larger and smaller integers. Write out every second integer, starting with the larger one and stopping at the lower one. (note: if one number is even and one is odd, the lower value will not show up in the output).

  Explain roles of hardware and software components

Discussion is designed to help you understand the roles of hardware and software components in a modern computer system. For the purposes of this Discussion, assume that you are heading a team of 25 people working on a software development project..

  How many times would you like to shuffle the sorted list

You are required to implement your designs in C++ Programming Language. Your program should be properly laid out and should be modular, making sure that software engineering aspects of modularity and reusability are fully considered.

  A "mynum" class that will read "randfile.txt" file

A "MyNum" class that will read "randFile.txt" file and obtain the 20,000 integer numbers

  Create your own eclipse java project and filereverserxw

Review the attached Javadoc (unzip the file and open the index.html file in a browser), and class UML diagram. These are from the project in the video, so should be clear how the implementation proceeds. Create your own Eclipse Java project, FileR..

  How does a sequential file work

How does a sequential file work? Provide an example. Provide C++ code that opens, reads, and then closes a sequential file

  Write a corresponding if else statement

The mathematical operation max(x,y,w,z) can be represented by using the conditional expression operator, as in:  max = (x > y && x > z && x > w) ? x : ((y > z && y > w) ? y : ((z > w) ? z : w))  Write a corresponding if else statement that is equival..

  Create and prepare a disk file for records containing struct

Store the account records in the file using the same hashing/rehashing technique used for storing them in an array of structures.

  Program to build tax calculator

I need a C program that will address the application requirements called out in this Service Request: "SR-kf-008, Tax Calculator"

  Create an int variable and assign it a value

create an int variable and assign it a value. Print the int variable as a int and as a char.

  Write a program that will store 10 integers into an array

Write a program that will store 10 integers into an array. Only accept integers between -100 and 100. Display those integers. You must then square those integers by CALLING A FUNCTION to square each individual integer. That function must be called, s..

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd