Text Encryption - ROT 13

In previous classes, we’ve discussed hardware and operating systems. However, what really caught my eyes was the text encryption part, ROT 13.

Ultimately, encryption is used to encode a message to the unreadable cipher text so that to achieve data security.  ROT 13 as an algorithm, it encrypts data by swapping positions of the first 13 letters to the next 13. Because of its super simple encryption schemes (you can obtain the original message just by encrypting the encrypted message again), ROT 13 is not expected to be used for the purpose of security.

It is a bit confusing that now that the cipher text is so simple, yet why would people still want to use ROT 13? What is the implementation of ROT13? Ergo, I checked it up on the internet, and found out that the feature of ROT 13 allows us keep messages that contain obscene/ sensitive matters from unnecessary disputes, block spams, discourage show spoilers or hide the answers to riddles. Surprisingly, many cellphone apps we’re using today implements ROT 13 just because it provides such a simple way to obfuscates data, par exemple, Apple. In the iPod Notes Feature Guide, it states that ROT 13 is “used to make a "museum mode" presentation a little harder to steal and modify.”