— to areas with physical access control, e.g. entertainment facilities, train stations, shops, libraries, banks, or border control,

— for small groups of persons, e.g. families with small children or seniors, or other accompanied persons in need of support,

— by means of biometric authentication technologies, e.g. facial, fingerprint, or vein recognition,

— in the European regulatory context.

— accessibility and usability,

— user guidance including group guidance and interaction control,

— privacy including data set content,

— presentation attack detection,

— applicable biometric technologies,

— storage of reference data,

— biometric process integration,

— specific needs considering biometrics for groups,

— biometric performance and error rates, and

— group internal linkage.

— IT security,

— application specific physical security,

— policy definition,

— processes not related to biometric authentication, and

— specific performance requirements of identification (1:N) and verification (1:1) applications.