Abstract: A technique of authenticating an operator of a wireless terminal device is presented, wherein the first terminal device comprises a subscriber identity module (SIM) and wherein a subscription identifier is stored in the SIM. A method aspect of this technique comprises receiving the subscription identifier or a temporary identifier associated with the subscription identifier. The method aspect also comprises receiving a first set of biometric data of the operator, wherein the first set of biometric data has been entered by the operator at the terminal device, and sending a database request towards a subscriber database in a core network domain of a wireless communication system, the database request including the subscription identifier or the temporary identifier.

Abstract: Methods and apparatuses start lawful interception of an ongoing communication process in an after-handover network environment prior to completing an international handover of a user device. The user device is party of the ongoing communication process and an LI target. The user device being an LI target is determined based on the user device's identity, which is retrieved if the international handover is initiated.