Symbolic Logic, Inc.
SECURE RE-USE OF SIM SECURITY PARAMETERS BETWEEN DIFFERENT PARTIES

Abstract:

Various arrangements for using a subscriber identification module (SIM) card for authentication on a wireless network are detailed herein. A DKi (delta Ki) value can be stored by a SIM card. The SIM card can calculate a FKi (full Ki) value using the DKi value and a BKi value. The SIM card can be used to attach to the wireless network, wherein the SIM card is installed within a wireless device. The SIM card can receive a challenge from the wireless network. The SIM card can calculate an answer to the challenge using the FKi value. The answer can then be transmitted to the wireless network.