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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.
Consider the operation of a line of supermarket checkouts and the profiles of customers and their shopping baskets. Use a random number generator to create the data for these profi
Complete the following program to move a value of 0xFFH to PORTB LIST p=18f4550 #include org 0x0000 movlw 0x00 _________ movlw 0xFF movwf PORTB end .
What is a genotype of parents
how to rewrite C++ program the DNAStrand class (DNA Project) to instead store the nucleotide sequence in a dynamically-allocated array?
what is the c.
Python Programming hmw help!! Write a program that ask the user to input the followings: number of shares, stock price, and broker commission. Last month jim purchased some stock
Implement a two-dimensional table in Prolog. Your program will contain: An insert_entry predicate that takes a table, row, column and an entry and inserts the entry at the g
Introduction Each module of the course includes a programming project. However, for Modules 5 and 6 we will do a single project to cover both. The purpose of the programming p
I''m doing a project for class in college and im supposed to use today''s date and figure out how old i am in months, days, minutes, and seconds. My question is what is the beset
A number of simple student records are written to a text file. The format of some typical linesshould be - Task (1): Using a text editor, create a file with 10 such reco
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