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Rail Fence Encryption and Decryption in Java

Rail Fence Cipher in Java 00:54 - Encryption 02:37 - Testing Matrix 03:09 - Putting letters one by one in matrix in zig-zag 04:42 - testing zig-zag matrix 05:20 - changing zig-zag matrix to encrypted string, row by row 06:09 - testing encryption 06:23 - Decryption 06:55 - changing order of cipher text letters in matrix, to make it possible to be decrypted 08:18 - testing cipher reordering 09:16 - adding re ordered text in to decrypted string, diagonally to get un-encrypted text -*- Support on Patreon:   / voxelpixel   -*- Source Code: https://github.com/VoxelPixel rail fence cipher encryption and decryption using java programming language Rail fence is sometimes also called a zig zag cipher. Rail fence cipher is a transposition cipher, its algorithm is as following: -- To Encrypt -- Take a plain text message. Define number of rows. Start writing plain text message, letter by letter in rows in zig-zag ordering. Once all letters are written in zig zag, write all the letters of first row. Followed by all letters of the second row, continue doing this until all rows are covered. This new written collection of letters is cipher text. -- To Decrypt -- Take cipher text. Define number of rows. Count total number of letters in ciphertext. now start putting any random symbol lets suppose a '.' in zig-zag, in rows and keep doing that till number of '.' is equal to number of letters in cipher text. Now start putting letters of cipher text at places of '.' but this time don't put in zig-zag, instead, this time put letters one by one as they are in cipher text on dots in rows Once all rows are covered, take letters one by one in zig-zag from newly created zig-zag matrix after replacing '.' with letters This new line is decrypted plain text.