Ask a new question Source codeĭCode retains ownership of the "Nihilist Cipher" source code. Upload the file PolybiusCipher.py to the Web-CAT automated grading platform.The Russian nihilist movement is described in the history textbooks as between 18.JUnit indicates a successful test with a green bar, and an unsuccessful test with a red bar. Click on the Run Tests button to execute the JUnit test bench.When the function call decrypt("bcfbfeacbdadafcacafacacedfffffabfa", key) is executed, the output of the program should be: buy12cheesepizzas.You will write your solution in a function called decrypt(String message, String key) right below the place where it says: YOUR CODE HERE.Write a Java program in the file PolybiusCipher.py that decrypts a message using the polybius cipher.A lookup in a two-dimensional grid can be achieved by using two pairs of square brackets as follows:Ĭontents of lab07.zip: Lab07PolybiusCipher/ The first number from the pair corresponds to the the row, and the second digit corresponds to the column. Then, you must separate out pairs of digits from this number sequence, and perform a lookup in the two-dimensional key grid.Make sure that your resulting number sequence is in a string format.You should use the method indexOf() to extract each letter's index. You are provided with the following: String alpha = "abcdef" Note that each letter is placed in accordance with its associated index.Your first task is to transform these letter symbols into their corresponding number symbols. Each of the letter symbols corresponds to a row or column number in the polybius grid. ![]() Upon close inspection, you should notice that the provided letters consist of the symbols "a", "b", "c", "d", "e" and "f". Instead, you are provided with a series of letters. You will notice that you are not given a sequence of numbers to decode. ![]() For example, the number sequence "0520020214" can be decoded to the word "hello".
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