title: AES key size in Java
body: <p>Testing RSA to encrypt an AES key, I <a href="https://stackoverflow.com/questions/2579103/too-much-data-for-rsa-block-fail-what-is-pkcs7">realized</a> that RSA has only 1 block with a limited size (settable by the programmer) do store the encrypted key.
  The question is, when I use:</p>
  
  <pre><code>KeyGenerator.getInstance("AES").generateKey()
  </code></pre>
  
  <p>the AES keys will have a constant size in every computer and jvm implementation?</p>