title: How to secure my api key?
body: <p>I want to use from my android/ios app the autocomplete api. For this I need to call url like:</p>
  
  <pre><code>https://maps.googleapis.com/maps/api/place/autocomplete/json?input=paris&amp;key=&lt;myapikey&gt;
  </code></pre>
  
  <p>the problem is: What can make that someone else will not extract from my app my api key and use it for his own purpose ? It's important because at the end it's me who will be billed by google for the usage ...</p>