Is there a difference between "addition" and "bitwise addition"?
<p>As a little project (nothing mission critical), I decided to try and write an implementation of GOST 28147-89 in C#. However, while reading through <a href="http://tools.ietf.org/html/rfc5830#section-3.2">RFC 5830</a> (an informational defining GOST 28147-89), I noticed this.</p>

<blockquote>
  <p>(+)  is a bitwise addition of the words of the same length modulo 2.</p>
  
  <p>[+]  is an addition of 32-bit vectors modulo 2^32.</p>
</blockquote>

<p>What is the difference between these two, mainly the first specifying <em>bitwise</em> addition, and the second simply stating addition?</p>
