https://www.youtube.com/watch?v=KST4bGAH-8Y&ab_channel=DianaDvoryak   Шифр Виженера


https://youtu.be/sGFbM-X6W_4?si=DwsrRdLL5KkB2M-s

https://www.youtube.com/watch?v=uVkXk0PW6SA&ab_channel=DSS375

gpg
https://www.gpg4win.de/thanks-for-download.html