Task 1. https://cryptii.com/pipes/caesar-cipher 2. https://www.boxentriq.com/code-breaking/rail-fence-cipher 3. https://morsle.fun/ 4. https://kids.nationalgeographic.com/games/action-adventure/article/crack-the-code-1 5. https://www.braingle.com/games/codebreaker/index.php?play=1&level=1