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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.
Your task is to write an application to analyse texts in a file. Your application will employ several kinds of text-analyser objects (which you also have to implement) as descri
Introduction Currently, Omega has 178 stores UK wide. Most cities and large towns within the UK are catered for by Omega. Omega began in 1960's selling various makes of telep
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Microsoft Intermediate Language in .NET When you create value in any terminology and gather, it will be changed to an 'Intermediate Language' (Microsoft Advanced Language - MSIL
Write a Perl program ghici.pl, one of the simplest computer games. The program should generate a random integer between 1 and 1000 and asks the user to guess it. If the user ?nds t
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The following is the process an account holder of eBroker, a discount online brokerage firm, uses to sell stocks. The user first logs in by entering the username and password.
how much it will cost? i need learn how to make rightsided triangle in forloop
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You must use the keyword ''var'' to create and initialize a variable. The placement of the variable creation in your code is very important. Examples: var first = 21; var secon
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