Encrypt and decrypt messages using the Caesar cipher! Click on "set cipher key" to pick a number between 0 and 26 (exclusive) to set the encryption key. Set the mode to "Encrypt Mode" to type in a message using normal English. Press "Encrypt Message" to type in your message. To decrypt a message, enter the encryption key. Set the mode to "Decrypt Mode" (the ENCRYPT/DECRYPT mode button is a toggle). Then press "Decrypt Message" and type in encrypted message to see what the message really says.
Caesar cipher - encrypt a message or decrypt a message, given the Caesar cipher key (a number), which tells how many times to shift the letters of the alphabet. Credit to Prinseskat from 17 Dec 2015 post in Scratch discussion forums for converting text to uppercase.
