var fs = require('fs');
var Whisper = require('whisper.json');
var secret = fs.readFileSync('some/secret.key', 'utf8');
 
var encrypt = new Whisper('encrypt', { secret });
fs.createReadStream('some/config.json')
  .pipe(encrypt)
  .pipe(fs.createWriteStream('some/encrypted-config.json'));
 
 
var decrypt = new Whisper('decrypt', { secret });
fs.createReadStream('some/encrypted-config.json')
  .pipe(decrypt)
  .pipe(process.stdout);