UnderstandKaraca's EncryptingMethod

What isKaraca?

Karaca's encryption is an algorithm commonly used for programming excercises.
It's used to teach the fundamentals of working with strings, arrays, dicts, and anything you can make the encryption algorithm with.
As every encryption algorithm, it lets you encrypt text following some rules, which the person decoding the text has to Understand in order to decrypt it.

Karaca's algorithm brief explanation on how does it work

How does it work?

Karaca'salgorithm follows a series of steps:

  1. Reverse the word.
  2. Convert the vowels based on the following rules.
    A = 0 | E = 1 | I = 2 | O = 3 | U = 4
  3. Add 'aca' to the end of the word
Karaca's algorithm explanation step by step

How to code Karaca's?

Encryption

The encryption() function approach is really simple, following the steps of the already known process.

First, we create a vowel array to know what vowel goes for each number. Then we reverse the word by using JS built-in functions for turning a string into an array (split("")) and reversing an array (reverse()).

On the second step we convert the vowels, helped by an extra variable where we're going to store what goes into the converted word. We for our way through the reversed array and evaluate whether the character that we're reading is a vowel or not. If it is, we're going to find it in our vowels array and we'll use the index to fill the character.

Lastly, we just add an "aca" string to the end of it and call it a day.

Encrypting algorithm using JavaScript code Copy Karaca's encryption code

Decryption

The process for decryption is really easy when you get the encryption function down.

We're going to keep the same vowels array, and we'll start by substracting the "aca" substring to the end of our word with the slice function that keeps all the characters between 0 and -3, and gets rid of the excess.

Secondly, we reverse the word using the same method we used on the encryption function.

Lastly we convert the vowels by going through all the characters on our array and checking with the /\d/.test(word[i]) regex if it's a number.
If it is, we just use it as the index for the vowel to use.

Decrypting algorithm using JavaScript code Copy Karaca's encryption code
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Only use different numbers!

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