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1. (WO2018052409) METHODS AND APPARATUSES FOR PROTECTING PRIVACY OF INTERNATIONAL MOBILE SUBSCRIBER IDENTITY

Pub. No.:    WO/2018/052409    International Application No.:    PCT/US2016/051642
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Thu Sep 15 01:59:59 CEST 2016
IPC: H04W 8/02
H04W 8/26
H04W 12/02
Applicants: NOKIA SOLUTIONS AND NETWORKS OY
JERICHOW, Anja
MIZIKOVSKY, Semyon
NAIR, Suresh
Inventors: JERICHOW, Anja
MIZIKOVSKY, Semyon
NAIR, Suresh
Title: METHODS AND APPARATUSES FOR PROTECTING PRIVACY OF INTERNATIONAL MOBILE SUBSCRIBER IDENTITY
Abstract:
Systems, methods, apparatuses, and computer program products protecting the privacy of subscriber identifier(s) are provided. One method includes receiving, at a subscription server, an authentication request comprising a pseudo international mobile subscriber identity (P-IMSI) of a user equipment. The method may then include obtaining a Mobile Station PseudoNym (MSPN) from the received pseudo international mobile subscriber identity (P-IMSI), checking a local Mobile Station PseudoNym (MSPN) cache for a Mobile Station PseudoNym (MSPN) value that matches the MSPN obtained from the received P-IMSI, locating an international mobile subscriber identity (IMSI) associated with the obtained MSPN and accessing a subscription record for the IMSI, and selecting a RAND and computing a new Mobile Station PseudoNym (MSPN) value and authentication vector (AV) using the selected RAND.