title: Exposing Entity IDs of Google Datastore data
body: <p>Is it save to expose entity ids of data that is in Google Datastore.
  For example in my code i have entity with this id:</p>
  
  <pre><code>@PrimaryKey
  @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY)
  @Extension(vendorName="datanucleus", key="gae.encoded-pk", value="true")
  private String id;
  </code></pre>
  
  <p>The id is going to be similar to this: <strong>agptZeERtzaWYvSQadLEgZDdRsUYRs</strong></p>
  
  <p>Can anyone extract password, application url and any other information from this string? What is the meaning of that string?</p>