Title:
PROCESS FOR ENSURING A SECURING INTERFACE BETWEEN A TELEPHONE WITH A CARD AND THE NETWORK IN A TELEPHONE SYSTEM
Document Type and Number:
WIPO Patent Application WO1997011548
Kind Code:
A3
Abstract:
PCT No. PCT/DE96/01634 Sec. 371 Date Mar. 17, 1998 Sec. 102(e) Date Mar. 17, 1998 PCT Filed Sep. 3, 1996 PCT Pub. No. WO97/11548 PCT Pub. Date Mar. 27, 1997In the method for dialing only preprogrammed telephone numbers, it is provided that when there is a desire for access or connection, the telephone number is transmitted from the telephone to the card, which checks a possible enabling of the number and, in the event of a positive result, uses a secret algorithm to produce a signature from this number and a varying code which is predetermined by the network. This signature is transmitted together with the number to the network, by which the enabling of the dialed number by the card is determined by checking the signature.
Inventors:
RAAF BERNHARD (DE)
Application Number:
PCT/DE1996/001634
Publication Date:
July 10, 1997
Filing Date:
September 03, 1996
Export Citation:
Assignee:
SIEMENS AG (DE)
RAAF BERNHARD (DE)
RAAF BERNHARD (DE)
International Classes:
H04L9/32; H04M1/66; H04M1/675; H04M3/38; H04M15/00; H04Q7/38; (IPC1-7): H04M3/38
Foreign References:
| EP0635964A1 | 1995-01-25 | |||
| EP0502446A2 | 1992-09-09 | |||
| GB2211050A | 1989-06-21 | |||
| DE4406602A1 | 1995-09-07 |
Other References:
DURAIAPPAN C ET AL: "ENHANCING SECURITY IN GSM", INTERNATIONAL COMPUTER SYMPOSIUM CONFERENCE PROCEEDINGS, vol. 1, 12 December 1994 (1994-12-12), pages 297 - 302, XP000577607
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