Caesar Cipher Disk

This is a very simple Caesar cipher disk. You can turn both wheels individually (or not). You can lock screen orientation, keep screen on and turn on vibrations. You can reverse the selected alphabet ("atbash style").

You can choose between :
* latin alphabet,
* hebrew alphabet,
* russian alphabet,
* greek alphabet,
* Union Cipher Disk used during the Civil War,
* Alberti Cipher Disk,
* Diana Cipher Disk (Diana Cryptosystem used during Vietnam War : http://www.blogbyben.com/2014/12/trigraphs-diana-pads-and-zombies.html - http://www.creativecrafthouse.com/index.php?main_page=product_info&cPath=143&products_id=1076),
* Vigenère Cipher Disk,
* Beaufort Cipher Disk,
* Custom Cipher Disk - limited to 40 characters per wheel (a long click on the Reset button to change the 2 wheels). You can manage 10 custom disks.

You can create a printable version of the current disk, stored in a PDF file (inside the folder "CAESAR CIPHER DISK" of the device's storage).

Note for the Union disk : a long click on the Reset button changes its default configuration.