Have you ever needed a way to send a text message without the worry that someone else will pick up the phone and stumble upon something personal that you have written?
Have you ever wondered how Caesar communicated in secret with his generals, or how to send "SOS" in Morse Code?
Are you interested in learning about how cool cryptology can be?
Then TextSafe on your iPhone or iPod Touch may just be the answer.
Throughout history people have sought out ways to communicate with one another despite the long distances separating them, and wished to do so in ways that allowed only the recipient to understand the message. From this evolved the many techniques for successfully sending secret "codes" to one another, most of which have become part of our historical record. TextSafe for iPhone and iPod Touch, allows the user to choose between 10 of the ciphers that have historically been used to keep information secret, and use them to encrypt and decrypt messages to and from friends.
To do the dirty work, TextSafe employs the following ciphers: Morse Code, Tap Code, ROT13, the Caesar Shift, the Affine Cipher, the Playfair Cipher, the ADFGVX Cipher, the Trifid Cipher, the Railfence Cipher, and the Vigenere Cipher. Some methods, for example Morse Code, require no information to decrypt. Others require a keyword, a date, a set of numbers, or other information from the sender to be able to successfully decrypt the message. Information on the history of the ciphers as well as a brief description of how each works can be found within the application. One thing to keep in mind, though, is that if some genius with enough computing power and an intimate understanding of cryptanalysis REALLY wants to read your message, he or she can, so avoid revealing the location of the buried treasure or where grandma hides the family heirlooms!.
.. ... . . ..... . . ..... .. . .... ..... ... ... !!! (Tap Code)