> 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/selphid/release_notes/6.0.0_releasenotes.md).

# 6.0.0

In this version, a new facial engine has been implemented. A new licensing system has also been integrated. From now on, the files `license.lic` are obsolete. Instead, a license code will be provided in the format `XXXXXX-XXXXXX-XXXXXX-XXXXXX-XXXXXX-XXXXXX`.

### Added

* New environment variable `FACEPHI_SELPHID_LICENSE_KEY` to provide the license code.

### Changed

* Authentication engine.

### Removed

* Environment variable `FACEPHI_SELPHID_FACIAL_LICPATH_KEY`, since `license.lic` has been discontinued.