title: Elliptic curve threshold cryptography in node
body: <p>I'd like to implement something like the <a href="https://en.wikipedia.org/wiki/Two-man_rule" rel="nofollow noreferrer">two-man rule</a> using elliptic curve cryptography in javascript. </p>
  
  <p>Edit: I'm essentially looking for something like Bitcoin multisig.</p>
  
  <p>So I need to take combine two public keys to get a combined key that requires both private keys to produce a signature. See <a href="https://crypto.stackexchange.com/questions/25250/adding-two-public-keys">https://crypto.stackexchange.com/questions/25250/adding-two-public-keys</a>.</p>
  
  <p>How can I do this in node?</p>