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Standalone Complete Sudoku puzzle Game Solver Generator for Windows
This is the most complete and standalone Sudoku puzzle suite for Windows. It includes comfort playing with undo steps and powerful Sudoku generator with different difficulty levels. Also you can create Sudoku game manually and print it on an A4/Letter paper. Tutorial mode with solving hints for newbies is included too. Also there is High Score table and built-in timer for professional players.
The Sudoku generation algorithm used by this app is my ultimate proud. Primarily it was based on...
...This is a demonstration of working of XOR encryption which was used by Germans in World War II (http://en.wikipedia.org/wiki/Lorenz_cipher) .
Besides from XOR'ing the message with password after every encryption the key changes pseudorandomly.
The password you provide is hashed ( SHA256 ) and saved into the encrypted file to check if the password provided is correct.This algorithm has limitations in general more the numbers of relative characters in the password to plaintext more secure will be the encryption.
XOR encrypt has a 3.5 of 5 editors rating from softpedia
http://www.softpedia.com/get/Security/Encrypting/XOR-Encrypt.shtml