> For the complete documentation index, see [llms.txt](https://docs.facephi.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.facephi.com/docs.facephi-en/sdks/backend-sdk/voice/release_notes/2.0.0_release_notes.md).

# 2.0.0

In this Version...

### Changed

* The Enrollment and Authentication endpoints must be called with encrypted audio and templates, and the response will also be encrypted.
* The format of the responses for the Bad Request and Internal Server Error errors has changed. Now the response is a json with the following format:

  * Bad Request:

  ```json
  {
    "status": 400,
    "error": "BadRequest",
    "timeStamp": "2022-01-14T10:42:05.521922Z"
  }
  ```

  * Internal Server Error:

  ```json
  {
    "status": 500,
    "error": "Voice-SDK Exception",
    "exception": "Bad format",
    "timeStamp": "2022-01-14T10:42:05.521922Z"
  }
  ```