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The Algorithm § The Atbash cipher is essentially a substitution cipher with a fixed key, if you know the cipher is Atbash, then no additional information is needed to decrypt the message. Or you could set your method to return some random type (e.g. Nya sehingga penulis dapat menyelesaikan penyusunan skripsi ini dengan judul APLIKASI KRIPTOGRAFI MENGGUNAKAN METODE CAESAR CIPHER BERBASIS WEB. Skripsi ini disusun guna melengkapi salah satu persyaratan untuk memperoleh Gelar Kesarjanaan Program Studi Teknik Informatika Fakultas Teknik Universitas Muria Kudus. is a java program to implement playfair cipher algorithm. use for loop for traversing each character of the input stringįor (int i = 0 i "+encryptData(inputStr, shiftKey)) Public static String encryptData(String inputStr, int shiftKey) create encryptData() method for encrypting user input string with given shift key

Public static final String ALPHABET = "abcdefghijklmnopqrstuvwxyz" ALPHABET string denotes alphabet from a-z create class CaesarCipherExample for encryption and decryption import required classes and package, if any Let's use the above-discussed steps and implement the code for the Caesar Cipher technique. Depending on the encryption and decryption, we transform each character as per the rule.Traverse input string one character at a time.The input integer should be between 0-25. Take an input integer from the user for shifting characters.Take an input string from the user to encrypt it using the Caesar Cipher technique.We use the following steps to implement the program for the Caesar Cipher technique: We can mathematically represent the encryption of a letter by a shift n in the following way:Įncryption phase with shift n = E n (x) = (x+n)mod 26ĭecryption phase with shift n = D n (x) = (x-n)mod 26 Examples The integer value is known as shift, which indicates the number of positions each letter of the text has been moved down.

Based on his name, this technique was named as Caesar Cipher technique.Īn integer value is required to cipher a given text. Julius Caesar was the first one who used it for communicating with his officials. In this technique, each letter of the given text is replaced by a letter of some fixed number of positions down the alphabet.įor example, with a shift of 1, X would be replaced by Y, Y would become Z, and so on. It is one of the simplest and most used encryption techniques.

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