title: Best Hash function for detecting data changes?
body: <p>We have a pricing dataset that changes the contained values or the number of records. The number of added or removed records is small compared to the changes in values. The dataset usually has between 50 and 500 items with 8 properties.</p>
  
  <p>We currently use AJAX to return a JSON structure that represents the dataset and update a webpage using this structure with the new values and where necessary removing or adding items.</p>
  
  <p>We make the request with two hash values, one for the values and another for the records. These are MD5 hashes returned with the JSON structure to be sent with a following request. If there is a change to the hashes we know we need a new JSON structure otherwise the hashes are just returned to save bandwidth and eliminate unnecessary client-side processing.</p>
  
  <p>As MD5 is normally used with encryption is the best choice of hashing algorithm for just detecting data changes?</p>
  
  <p>What alternative ways can we detect a change to the values and update as well as detecting added or removed items and manipulating the page DOM accordingly?</p>