Published
Edited
Apr 4, 2020
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2 stars
{
// Encode a string 26 times simultaneously, once for each key of the classical Caesar Cipher.
const gpu = new GPU();
const alphabet = 'abcdefghijklmnopqrstuvwxyz';
const plaintext = 'helloworld';
const plaintextIntegerArray = plaintext.split('').map(letter => alphabet.indexOf(letter));
const caesarCipher = gpu.createKernel(function (plaintextIntegerArray, alphabetLength) {
return (plaintextIntegerArray[this.thread.x] + this.thread.y) % alphabetLength;
})
.setOutput([plaintext.length, alphabet.length]);
return caesarCipher(plaintextIntegerArray, alphabet.length)
.map(ciphertexts => [...ciphertexts]
.map(index => alphabet[index]).join(''));
}
GPU = (await require('gpu.js@latest')).GPU
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