Emoji Shifting Cipher

Javascript text to Emoji Encryption

Encryption/Decryption of Emoji strings.

Whilst speaking to a group of friends we discussed the idea of sending encrypted messages in the form of Emojis. This lead to me implementing a basic encryption/decryption Javascript driven page using one of the simplest forms of encryption, the cipher shift.

<input id="input" />

<button onclick="encrypt()">Encrypt</button>
<button onclick="decrypt()">Decrypt</button>

<p id="demo"></p>

<script>
  function encrypt() {
    input = document.getElementById("input").value;
    if (input[0].toLowerCase() == "e") {
      var add = Math.floor((Math.random() * 90) + 10);
      input = input.substring(2);
      output = "E" + add + " ";
      for (i = 0; i < input.length; i++) {
        output += emoji[alphabet.indexOf(input[i]) + add] + " ";
      }
    }
    document.getElementById("demo").innerHTML = output;
  }

  function decrypt() {
    input = document.getElementById("input").value;
    if (input[0].toLowerCase() == "e") {
      var add = parseInt(input[1] + input[2]);
      input = input.substring(4);
      output = "E" + add + " ";
      var emote = input.split(" ");
      for (i = 0; i < emote.length; i++) {
        output += alphabet[emoji.indexOf(emote[i]) - add];
      }
    }
    document.getElementById("demo").innerHTML = output;
  }

  var alphabet = ["A", "B", "C", "D", "E", "F", "G", ... etc .. ];

  var emoji = [":egg:", ":earth_africa:", ":cd:", ":koko:", ":rage1:", ... etc ... ];

</script>

Andrew Pheasey

Emoji Shifting Cipher

Javascript text to Emoji Encryption