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simple_rsa_demostration.js

// https://hackernoon.com/how-does-rsa-work-f44918df914b
const key = {
	mod: 14,
	pub: 5,
	prv: 11,
};

const msg = 'hello';

const bits = [...msg].map(c => c.charCodeAt().toString(2).padStart(8, '0')).join('');
const bits2 = bits.match(/../g).map(c => parseInt(c, 2));

const enc = bits2.map(c => {
  return (c ** key.pub) % key.mod;
});

const dec = enc.map(n => {
  return (n ** key.prv) % key.mod;
});

console.log(
  dec
  	.map(n => n.toString(2).padStart(2, '0')).join('')
  	.match(/.{8}/g).map(b => String.fromCharCode(parseInt(b, 2)))
  	.join('')
);