CIPHERING BETWEEN A CDMA NETWORK AND A GSM NETWORK

Title:

CIPHERING BETWEEN A CDMA NETWORK AND A GSM NETWORK

Document Type and Number:

WIPO Patent Application WO2004091176

Kind Code:

A3

Abstract:

Shared secret data is used to authenticate and encrypt between a CDMA network and a GSM network such that a mobile station having a subscription in a GSM network can roam into a CDMA network and be authenticated to use the CDMA network and have messages encrypted without having a CDMA subscription. The goal of authenticating a GSM subscriber in a CDMA network using GSM authentication credentials is achieved by substituting a key Kc as SSD-A and messages are encrypted substituting Kc as SSD-B using a CAVE algorithm.

Inventors:

JAIN NIKHIL (US)
COLLINS BRUCE (US)
NAGARAJ THADI M (US)

Application Number:

PCT/US2004/010304

Publication Date:

February 17, 2005

Filing Date:

April 02, 2004

Export Citation:

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Assignee:

QUALCOMM INC (US)
JAIN NIKHIL (US)
COLLINS BRUCE (US)
NAGARAJ THADI M (US)

International Classes:

H04K1/00; H04L9/32; H04L29/06; H04M3/16; H04W12/06; H04W8/02; H04W12/02; (IPC1-7): H04K1/00

Foreign References:

US6144653A	2000-11-07
US5887251A	1999-03-23

Other References:

HAVERINEN H. ET AL: "Authentication and key generation for mobile IP using GSM authentication and roaming", IEEE INT'L CONF. ON COMMUNICATIONS, vol. 8, June 2001 (2001-06-01), pages 2453 - 2457, XP010553567
ROSE G.: "Authentication and security in mobile phones", QUALCOMM AUSTRALIA, August 1999 (1999-08-01), pages 1 - 6, XP002982338
CHAUHAN R.: "Cellular subscriber authentication IS-95", POWERPOINT SLIDES, October 2001 (2001-10-01), pages 1 - 41, XP002982339
See also references of EP 1618692A4

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