> 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/6.6.0_releasenotes.md).

# 6.6.0

In this Version, we have added an IAD prefilter for the liveness check engine. The purpose of this prefilter is to improve liveness detection against the presence of IAD attacks. In addition, the service endpoint responses now include a new property `sdkDuration`, which indicates the time spent by the SDK processing the request. Finally, support for `ValidTimeStamp` in `SelphIDFacialExtractionResult` and `SelphIDDocumentResult`, and the authentication endpoints of the Rest-API service have been improved, adding the extraction results of both the image `query` and the image `target`.

### Added

* IAD prefiltering (Injection Attack Detection) for the liveness check engine. It detects bands at the edges (Bands to edges) and scaled nearest neighbor.
* Some improvements to the base64 library.
* Added `SelphIDFacialExtractionResult::Set/GetValidTimeStamp()`.
* Added `SelphIDDocumentResult::Set/GetValidTimeStamp()`.
* New property `sdkDuration` in the service endpoint responses.
* New property `validTimeStamp` in the service endpoint responses.
* `longDetail` in `options` of the service endpoints. If it is `true`, the endpoint result will include additional information. If omitted, the default value will be `false`.
* If `options:longDetail==true`, the following will be added `extractionQuery` and `extractionTarget` (both of type `FacialExtractionResult`) to `FacialAuthenticationResult` in the service authentication endpoints.
  * `/api/v1/selphid/authenticate-facial/images`.
  * `/api/v1/selphid/authenticate-facial/image/template`.
  * `/api/v1/selphid/authenticate-facial/templates`.