When I hear "cryptography", I have a hard image, but I think that the application "CryptoyIn the UKGCHQHas been released. Cryptoy was released for Android, even junior high school students understand ...

To decrypt the message, the process is reversed. Caesar ciphers are often shown using a Caesar cipher wheel diagram, to illustrate that when the end of the alphabet is reached it goes around again.

Introduction If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message—that is, use a secret code that only you and your ...