gistfile1.js

// Secure random hex in js like SecureRandom.hex in ruby

function secureRandom(n){
 n = n+1 || 17;
 var str = [];
 while (--n) {
  var r = Math.floor(Math.random()*256)
            .toString(16)
            .substr(Math.floor(Math.random()*2),1) 
          || String.fromCharCode(65+(Math.floor(Math.random()*8)));
  str.push(r);
 }
 return str.join('');
}