The App allows you to quickly and easily copy and share your encrypted message with your friends and family. Decrypting incoming messages also works like a charm.The Caesar cipher, also known as a shift cipher, is one of the simplest forms of encryption. It is a substitution cipher where each letter in the original message is replaced with a letter corresponding to a certain number of letters up or down in the alphabet.In this way, a message that initially was quite readable ends up in a form that can not be understood at a simple glance.