Another extension, Authentication for DHCP Messages (RFC 3118), provides a mechanism for authenticating DHCP messages. SAP features separate methods for authenticating and encrypting announcements. Higher Education Degree Datacheck is the official service for validating British degrees and authenticating universities. AH also guarantees the data origin by authenticating IP packets. The Court analyzed the narrow exception of a clerk certificate authenticating official records. It is used for unlocking the device and for authenticating purchases using Face ID. It handles the job of authenticating clients, as well as making the applications available remotely. It is responsible for authenticating the user (by interacting with the HSS). IPSec can use the RFC 4945 profile for authenticating peers. Language has been a critical asset for authenticating ethnic identities. Hearsay standards are similarly relaxed, as are the standards for authenticating written documents. Communication among the different specialties was poor, and they often made mistakes when authenticating pieces. It is important for understanding, authenticating, and dating ancient texts. The following crew list also contains the locations where they worked and any authenticating references.