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You are working for a cryptography department, where one of your jobs is to decipher intercepted messages that have been encrypted using a book cipher. The messages are sent by different people, each of whom writes their plaintext in a different language to confuse any attempt to decipher the messages. But this has made them a little too confident, and you have discovered a very useful secret: unaware that their messages can be cracked, each sender tends to use the same book passage over and over; all that changes is where in that passage they start the encryption. Being very lazy, they always start the encryption within 20 letters of the start of the passage. So for the purposes of this task, the 'key' is simply the starting position in the book text, and is a number from 0 to 20. Your job now is to write a computer program (a real executable program, not a spreadsheet) that can be used to decrypt these intercepted messages. The program will be required to read the ciphertext from a file and to display the plaintext on the screen, along with the key that was used to encrypt it. You will be asked to demonstrate your program to the tutor in the lab class on the due date. This is so that you will be there to run the program and make any decisions that need making. You will be given several ciphertexts to practice on, but in the demonstration you will be asked to demonstrate your program on files you have not seen. You may write your program in whatever programming language you wish.
Simple Shell In this LAB, you will explore and extend a simple Unix shell interpreter. In doing so, you will learn the basics of system calls for creating and managing process
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How Can I Retrive Unicode CSV File the ADO.net VB.net
(a) Define a procedure (subsets x) that takes a list as a single argument and returns all 2^n subsets of that list, i.e. the power set of the list; e.g. (subsets '(a b c)) ==> (
You will design and implement a program that will • analyse the various characteristics of a maze, represented by a particular coding of its basic con- stituents into numbers store
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1. Develop a Web page, indicating an ordered list of the names of your five friends. 2. Develop an HTML document with a nested list indicating the content page of any book 3.
Suppose you have a ?le orase of city and country names, like this: Cluj, Romania Debrecen, Hungary Klagenfurt, Austria Berlin, Germany Szeged, Hungary Budapest, Hungary Lintz, A
Your task for this project is to develop a system that would provide the following features: 1. Register new student 2. Drop student from university 3. Add a course and gr
1. Write a program that figures out how long it will take to pay off a credit card by making payments of $10 each month. Take care to avoid infinite loops. (How would a bank preven
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