title: Do i need to install crypto module from npm?
body: <p>I am making use of crypto module in my app. 
  It seems like there is crypto module distributed in nodejs <a href="http://nodejs.org/api/crypto.html" rel="noreferrer">http://nodejs.org/api/crypto.html</a>
  so do i need to do npm install crypto? what is the difference from <a href="https://npmjs.org/package/crypto" rel="noreferrer">https://npmjs.org/package/crypto</a> and nodejs api crypto modules?</p>