EP1082837A2 - Procede de telephonie sure avec mobilite dans un systeme de telecommunication et de communication de donnees qui comprend un reseau ip - Google Patents

Procede de telephonie sure avec mobilite dans un systeme de telecommunication et de communication de donnees qui comprend un reseau ip

Info

Publication number
EP1082837A2
EP1082837A2 EP99929982A EP99929982A EP1082837A2 EP 1082837 A2 EP1082837 A2 EP 1082837A2 EP 99929982 A EP99929982 A EP 99929982A EP 99929982 A EP99929982 A EP 99929982A EP 1082837 A2 EP1082837 A2 EP 1082837A2
Authority
EP
European Patent Office
Prior art keywords
network
identity code
unit
mobility manager
initiating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99929982A
Other languages
German (de)
English (en)
Inventor
Per Gustavsson
Staffan Lundgren
Mattias Maartensson
Eskil Aahlin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telia Co AB
Original Assignee
Telia AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telia AB filed Critical Telia AB
Publication of EP1082837A2 publication Critical patent/EP1082837A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0807—Network architectures or network communication protocols for network security for authentication of entities using tickets, e.g. Kerberos
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/02—Network architectures or network communication protocols for network security for separating internal from external traffic, e.g. firewalls
    • H04L63/0281—Proxies

Definitions

  • the present invention relates to a method for safe telephony with mobility in a tele and data communications system which includes an IP-network.
  • Kerberos ⁇ A known solution of the managing of keys is called Kerberos ⁇ .
  • This known solution provides a central distribution of keys and is intended for users of services in networks. Kerberos ® attends to that the user can confirm his/her identity to a given service without risk that anybody is tapping the transmission in order to in a later stage unduly borrow the user's identity.
  • an authentication is performed in two steps. In the first step one issues an authentication service (AS) , a so called TGS-ticket in exchange for a person proving that he/she is the person he/she gives himself/herself out to be.
  • AS authentication service
  • the user identification is made by the user initially once and for all registers himself/herself manually and receives a password from Kerberos ® .
  • the password is stored centrally.
  • the TGS-ticket includes i.a. a TGS-session key, the name of the service (i.e. TGS), a time stamp and period of validity.
  • TGS-session key the name of the service (i.e. TGS)
  • TGS-session key the name of the service
  • TGS-session key the name of the service
  • period of validity i.e.
  • the user receives the TGS-ticket encrypted by TGS password and a copy of the TGS-session key encrypted by the user's password.
  • the TGS-ticket is valid as access to a ticket issuing service (TGS) .
  • TGS ticket issuing service
  • the user for that reason turns to TGS to get service tickets to other services.
  • the user transmits the TGS-ticket encrypted by TGS password and the name of the service which is asked for to TGS.
  • TGS returns a ticket to the service encrypted by the password of the service and a copy of a service session key encrypted by the TGS-session key.
  • For each new service the user wants to utilise he/she in the same way turns to said TGS and encloses his/her TGS-ticket in the transmission .
  • This known method has several advantages. The user need only give his/her password once per working period.
  • Kerberos ® is not directly applicable on IP-telephony with mobility, such as a system with DECT-telephones which have access to an IP- network. For that reason there exists a need for a security solution for such telephony.
  • the aim of the present invention consequently is to create a security solution for IP-telephony with mobility.
  • Figure 1 diagrammatically shows a tele and data communications system in which an embodiment of the method is implemented
  • Figure 2 diagrammatically shows a part of the system in Figure 1 in detail .
  • each DECT-telephone 3 an identity code (ID-code) is stored which is created in such a way that it is unique, preferably globally unique.
  • ID-code is transmitted to the base station 5 of the domain. From there the ID-code is forwarded to a mobility manager, here a so called proxy manager 9, see Figure 2, which is arranged in an IP-managing unit (IMU) 7.
  • the proxy manager 9 starts for each DECT-telephone 3 a proxy 11, i.e. en proxy which represents the DECT-telephone 3 towards the Internet, or any other IP-network.
  • the information is collected from a specific initiating database 13, which here is called telephone directory.
  • the telephone directory is reached via the IP-network 15.
  • Kerberos ® is utilised, and which i.a. is implemented on a server 17, which handles the central distribution of keys.
  • the information includes IP-address, the subscriber's user name, and a key for mobile IP.
  • the proxy manager 9 is user and the telephone directory 13 the service which shall be used.
  • the proxy manager 9 For the proxy manager 9 to receive the information, it consequently must authenticate itself to the AS-part of the server 17 to get a TGS-ticket, and then utilises the identity code as user identity, and then by transmitting the TGS-ticket to the TGS-part of the server 17 receive a service ticket to the telephone directory.
  • the information is transmitted well encrypted from the telephone directory 13 to the proxy manager 9, as has been described above.
  • the proxy manager 9 then starts a proxy 11 with the information as input data.
  • the proxy 11 now has the function of a mobile node. If it should be in a foreign network it will make use of a mobile IP to attend to that traffic which is intended for it is routed to right address.
  • This authentication is made by means of an encryption algorithm and a secret key which is shared by the mobile node, i.e. the proxy 11, and the mobility manager in its home network.
  • the secret key is the above mentioned key for mobile IP which the proxy manager 9 receivers from the database 13.
  • the proxy 11 is preferably compatible with the ITU- standard H.323, which can be utilised according to the following.
  • the receiver collects a session key from Kerberos ® and establishes a safe and authenticated channel. After that H.323 follows on.
  • the speech is accordingly transmitted encrypted in order that it shall not be possible to tap.
  • participants, which are not authorised subscribers in the system are prevented, by the authentication, from making free calls.
  • Kerberos ® can be exchanged for another equivalent method which implies equivalent good authentication and encryption.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un procédé de téléphonie sûre avec mobilité dans un système de télécommunication et de communication de données (1) qui comprend un réseau IP (15). Selon ce procédé la téléphonie est exécutée par des unités mobiles et le procédé de chaque unité mobile consiste: à créer un code d'identité unique et à le mémoriser dans l'unité; à transmettre le code d'identité à un gestionnaire de mobilité (9) lors de la commutation de l'unité, au moins lors de sa commutation dans un domaine local; à établir, via la réseau IP, le contact entre le gestionnaire de mobilité et une base de données d'initiation (13) aux fins de transmission des informations d'initiation destinées à la communication Internet entre la base de données d'initiation et le gestionnaire de mobilité, cette étape comportant l'authentification du gestionnaire de mobilité à l'aide du code d'identité en vue d'avoir accès à la base de données d'initiation, et le codage des données d'initiation lors de la transmission; à lancer un calcul par approximation (11) qui représente l'unité par rapport à l'Internet, à l'aide des données d'initiation.
EP99929982A 1998-05-27 1999-05-12 Procede de telephonie sure avec mobilite dans un systeme de telecommunication et de communication de donnees qui comprend un reseau ip Withdrawn EP1082837A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9801871A SE512440C2 (sv) 1998-05-27 1998-05-27 Metod för säker telefoni med mobilitet i ett tele- och datakommunikationssystem som innefattar ett IP-nät
SE9801871 1998-05-27
PCT/SE1999/000814 WO1999062222A2 (fr) 1998-05-27 1999-05-12 Procede de telephonie sure avec mobilite dans un systeme de telecommunication et de communication de donnees qui comprend un reseau ip

Publications (1)

Publication Number Publication Date
EP1082837A2 true EP1082837A2 (fr) 2001-03-14

Family

ID=20411477

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99929982A Withdrawn EP1082837A2 (fr) 1998-05-27 1999-05-12 Procede de telephonie sure avec mobilite dans un systeme de telecommunication et de communication de donnees qui comprend un reseau ip

Country Status (5)

Country Link
EP (1) EP1082837A2 (fr)
EE (1) EE03893B1 (fr)
NO (1) NO20005868L (fr)
SE (1) SE512440C2 (fr)
WO (1) WO1999062222A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807597B1 (fr) * 2000-04-11 2005-04-08 Sagem Procede de gestion de la mobilite de combines au sein d'un reseau de telecommunication sans fil
CN1322702C (zh) * 2003-12-30 2007-06-20 华为技术有限公司 因特网协议语音接入设备的认证方法
CN100349400C (zh) * 2004-02-11 2007-11-14 任荣昌 一种基于ip网用户身份的多业务交换方法及系统
HU226781B1 (en) 2004-03-01 2009-10-28 Miklos Jobbagy Device set for secure direct information transmission over internet
US8365258B2 (en) 2006-11-16 2013-01-29 Phonefactor, Inc. Multi factor authentication
US9762576B2 (en) 2006-11-16 2017-09-12 Phonefactor, Inc. Enhanced multi factor authentication

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5535276A (en) * 1994-11-09 1996-07-09 Bell Atlantic Network Services, Inc. Yaksha, an improved system and method for securing communications using split private key asymmetric cryptography
US5602918A (en) * 1995-12-22 1997-02-11 Virtual Open Network Environment Corp. Application level security system and method
GB2317792B (en) * 1996-09-18 2001-03-28 Secure Computing Corp Virtual private network on application gateway
US5684950A (en) * 1996-09-23 1997-11-04 Lockheed Martin Corporation Method and system for authenticating users to multiple computer servers via a single sign-on

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9962222A2 *

Also Published As

Publication number Publication date
EE03893B1 (et) 2002-10-15
NO20005868D0 (no) 2000-11-21
SE512440C2 (sv) 2000-03-20
WO1999062222A2 (fr) 1999-12-02
SE9801871D0 (sv) 1998-05-27
WO1999062222A3 (fr) 2000-02-03
EE200000701A (et) 2002-04-15
SE9801871L (sv) 1999-11-28
NO20005868L (no) 2001-01-25

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