trying to make public and private key based on http://www.youtube.com/watch?v=3QnD2c4Xovk

encryption.js

function enc(exp, private) {
    return Math.pow(exp, private) % 17;
}

function calc(pub1, private1, private2) {
    var a, b;
    a = enc(pub1, private1);
    b = enc(pub1, private2);
    return enc(b, private1) === enc(a, private2);
}

var i, j;
for (i = 0; i < 32; i++) {
    for (j = 0; j < 32; j++) {
        if (calc(3, i, j)) {
            console.count('valid');
        } else {
            console.count('invalid');
        }
    }
}