Caesar Cipher ISC Computer Science 2017 Practical
Caesar Cipher is an encryption technique which is implemented as ROT13 ('rotate by 13 places'). It is a simple letter substitution cipher that replaces a letter with the letter 13 places after it in the alphabets, with the other characters remaining unchanged. ROT13 A/a B/b C/c D/d E/e F/f G/g H/h I/i J/j K/k L/l M/m ↕ ↕ ↕ ↕ ↕ ↕ ↕ ↕ ↕ ↕ ↕ ↕ ↕ N/n O/o P/p Q/q R/r S/s T/t U/u V/v W/w X/x Y/y Z/z Write a program to accept a plain text of length L, where L must be greater than 3 and less than 100. Encrypt the text if valid as per the Caesar Cipher. Test your program with the sample data and some random data: Example 1 : INPUT: Hello! How are you? OUTPUT: The cipher text is: Uryyb? Ubj ner lbh? Example 2 : INPUT: Encryption helps to secure data. OUTPUT: The cipher text is: Rapelcgvba urycf gb frpher qngn. Example 3 : INPUT: You OUTPUT: INVALID LENGTH import java.util.Scanner; class CaesarCipher{ public static void main(String args[]){ Scanner i...