message: Add a security document discussing high level best practices and explain vulnerability reporting process.
diff: @@ -12,7 +12,6 @@ The source code for TensorFlow is on
  Before contributing to TensorFlow source code, please review the
  [Contribution guidelines](https://github.com/tensorflow/tensorflow/blob/master/CONTRIBUTING.md).
  -
  ### Projects developed by the TensorFlow community
  The TensorFlow community has created many great projects around TensorFlow, including:
  @@ -65,5 +64,6 @@ please read the following list carefully:
  [TensorFlow issues tracker](https://github.com/tensorflow/tensorflow/issues)
  on GitHub. For example, use the issue tracker to request a
  new operation in TensorFlow.
  -
  + * To report vulnerabilities, please follow our
  + [vulnerability disclosure guidelines](https://github.com/tensorflow/tensorflow/blob/master/SECURITY.md).
  