BS EN ISO 14819-6-2006 Traffic and traveller information (TTI) - TTI messages via traffic message coding - Encryption and conditional access for the radio data system - Traffic mes.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58message coding Part 6: Encryption and conditional access for the Radio Data System Traffic Message

2、Channel ALERT C coding The European Standard EN ISO 14819-6:2006 has the status of a British StandardICS 03.220.20; 35.240.60Traffic and Traveller Information (TTI) TTI messages via traffic BRITISH STANDARDBS EN ISO 14819-6:2006BS EN ISO 14819-6:2006This British Standard was published under the auth

3、ority of the Standards Policy and Strategy Committee on 28 April 2006 BSI 2006ISBN 0 580 48240 5The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Corresponden

4、ce Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itsel

5、f confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 19 and a back cover.The BSI copyright notice displayed in this document

6、indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesenquiries on the interpretation, or proposals for change, and keep UK interests infor

7、med; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard is the official English language version of EN ISO 14819-6:2006. It is identical with ISO 14819-6:2006.The UK participation in its preparation was entrusted to Technical

8、Committee EPL/278, Road transport informatics, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 14819-6April 2006ICS 03.220.20; 35.240.60English VersionTraffic

9、and Traveller Information (TTI) - TTI messages via trafficmessage coding - Part 6: Encryption and conditional access forthe Radio Data System - Traffic Message Channel ALERT Ccoding (ISO 14819-6:2006)Informations sur le trafic et le tourisme (TTI) - MessagesTTI via le codage de messages sur le trafi

10、c - Partie 6:Accs au cryptage et accs conditionnel pour le systmede radiodiffusion de donnes - Codage ALERT C du canalde messages sur le trafic (ISO 14819-6:2006)Verkehrs- und Reiseinformationen-TTI - Meldungen berVerkehrsmeldungscodierung - Teil 6: Verschlsselung undZugangsbedingungen fr das Radio

11、Datensystem -Verkehrsmeldungskanal ALERT C Kodierung (ISO 14819-6:2006)This European Standard was approved by CEN on 20 March 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standa

12、rd without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other langu

13、age made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germa

14、ny, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManag

15、ement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 14819-6:2006: EForeword This document (EN ISO 14819-6:2006) has been prepared by Technical Committee CEN/TC 278 “Road transpor

16、t and traffic telematics“, the secretariat of which is held by NEN, in collaboration with Technical Committee ISO/TC 204 “Transport information and control systems“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement,

17、 at the latest by October 2006, and conflicting national standards shall be withdrawn at the latest by October 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyp

18、rus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 14819-6:2006Reference numberISO 1

19、4819-6:2006(E)INTERNATIONAL STANDARD ISO14819-6First edition2006-04-15Traffic and Traveller Information (TTI) TTI messages via traffic message coding Part 6: Encryption and conditional access for the Radio Data System Traffic Message Channel ALERT C coding Informations sur le trafic et le tourisme (

20、TTI) Messages TTI via le codage de messages sur le trafic Partie 6: Accs au cryptage et accs conditionnel pour le systme de radiodiffusion de donnes Codage ALERT C du canal de messages sur le trafic EN ISO 14819-6:2006ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references

21、. 1 3 Terms and definitions. 2 4 Symbols and abbreviations . 3 5 Notation . 4 6 Application description 4 6.1 Introduction to RDS group bit pattern and notation . 4 6.2 RDS-TMC and Open Data Application 5 6.3 Summary of TMC data elements in type 8A groups 7 7 Principles of the Encryption and Conditi

22、onal Access methodology 8 8 Encryption by the service provider. 9 8.1 Service providers requirements. 9 8.2 Use of type 8A groups for RDS-TMC encryption. 9 8.3 Encryption Administration group . 10 8.4 Encrypting location codes. 12 9 Access to decrypted services by a terminal 13 9.1 Terminal manufact

23、urers basic requirements 13 9.2 Activation of a terminal 14 9.3 Identifying an encrypted RDS-TMC service . 15 9.4 Decrypting location codes. 15 10 Introduction of Encrypted services 16 10.1 Terminal responses 17 10.2 De facto strategy valid only for service providers wishing to generate revenue, pri

24、or to general availability of encryption 17 10.3 Actions for existing providers of unencrypted TMC services . 17 10.4 Actions for potential providers of TMC services. 18 10.5 Timescales. 18 Bibliography . 19 EN ISO 14819-6:2006iv Foreword ISO (the International Organization for Standardization) is a

25、 worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represente

26、d on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are draf

27、ted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Sta

28、ndard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14819-6 was prepare

29、d by Technical Committee ISO/TC 204, Intelligent transport systems, in collaboration with CEN Technical Committee CEN/TC 278, Road transport and traffic telematics, the secretariat of which is held by NEN. ISO 14819 consists of the following parts, under the general title Traffic and Traveller Infor

30、mation (TTI) TTI messages via traffic message coding: Part 1: Coding protocol for Radio Data System Traffic Message Channel (RDS-TMC) using ALERT-C Part 2: Event and information codes for Radio Data System Traffic Message Channel (RDS-TMC) Part 3: Location referencing for ALERT-C Part 6: Encryption

31、and conditional access for the Radio Data System Traffic Message Channel ALERT C coding EN ISO 14819-6:2006vIntroduction Traffic and traveller information may be disseminated through a number of services or means of communication. For such services, the data to be disseminated and the message struct

32、ure involved in the various interfaces require clear definition and standard formats, in order to allow competitive products to exist with any received data. The most widely supported data specification for TTI messages within Europe and elsewhere is RDS-TMC, specified in Parts 1, 2 and 3 of EN ISO

33、14819. In RDS-TMC, TTI messages are conveyed using type 8A groups with the Radio Data System, itself specified in EN 62106. The RDS-TMC standard was developed principally for the purposes of disseminating TTI data free-to-air, using a public-service model. However, in many countries, the adoption an

34、d continuance of TTI services requires a business model based on commercial principals whereby the costs for the collection of the data and its dissemination may be recovered by charging end-users or intermediaries to receive and use the data. In this model, a convenient way that this may be achieve

35、d is to encrypt the data in some way, the key to decrypt the data being made available on payment of a subscription or fee. In order to avoid a proliferation of different conditional access systems, the European receiver industry asked the TMC Forum to establish a Task Force to recommend a single me

36、thod of encryption capable of being widely adopted. The task force established criteria that any encryption method would have to fulfil. These included: conformity with the RDS and TMC specifications and guidelines; no, or only minimal, overhead in terms of data capacity required for encryption; no

37、hardware change to existing terminals required; availability for use by service providers and terminal manufacturers “freely” and “equitably”, either free-of-charge or on payment of a modest licence fee; applicability to both lifetime and term subscription business models; ability of terminals to be

38、 activated to receive an encrypted service on an individual basis. After calling for candidate proposals, the submission from Deutsche Telekom was judged by an expert panel to have best met the pre-determined criteria the task force had established. The method encrypts the 16 bits that form the Loca

39、tion element in each RDS-TMC message to render the message virtually useless without decryption. The encryption is only “light” but was adjudged to be adequate to deter all but the most determined hacker. More secure systems were rejected because of the RDS capacity overhead that was required. After

40、 ratification of the decision to adopt the Deutsche Telekom submission by the TMC Forum Business Group and Management Group, a group was appointed and given the remit to elaborate it and present it as a specification to be submitted for standardization. The group was also requested to produce guidel

41、ines for service providers and terminal manufacturers to aid implementation of the specification. This International Standard describes a non-proprietary light encryption and conditional access system that allows commercial models for RDS-TMC to exist. The reader is assumed to have a pre-existing un

42、derstanding of, and familiarity with, the RDS and RDS-TMC standards and implementation guidelines. EN ISO 14819-6:2006blank1Traffic and Traveller Information (TTI) TTI messages via traffic message coding Part 6: Encryption and conditional access for the Radio Data System Traffic Message Channel ALER

43、T C coding 1 Scope This document establishes a method of encrypting certain elements of the ALERT-C coded data carried in the RDS-TMC type 8A data group, such that without application by a terminal or receiver of an appropriate key, the information conveyed is virtually worthless. Before a terminal

44、is able to decrypt the data, the terminal requires two “keys”. The first is given in confidence by the service provider to terminal manufacturers with whom they have a commercial relationship; the second is broadcast in the “Encryption Administration Group,” which is also a type 8A group. This Inter

45、national Standard explains the purpose of the two keys and how often and when the transmitted key may be changed. Before an individual terminal may present decrypted messages to the end-user, it must have been activated to do so. Activation requires that a PIN code be entered. The PIN code controls

46、access rights to each service and subscription period, allowing both lifetime and term business models to co-exist. The International Standard also describes the considerations for service providers wishing to introduce an encrypted RDS-TMC service, migrating from either a “free-to-air” service base

47、d on public “Location Tables” or a commercial service based on a proprietary Location Table. Finally, “hooks” have been left in the bit allocation of the type 8A group to allow extension of encryption to other RDS-TMC services. 2 Normative references The following referenced documents are indispensa

48、ble for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 14819-1, Traffic and Traveller Information (TTI) TTI messages via traffic message coding Part

49、1: Coding protocol for Radio Data System Traffic Message Channel (RDS-TMC) using ALERT-C ISO 14819-2, Traffic and Traveller Information (TTI) TTI messages via traffic message coding Part 2: Event and information codes for Radio Data System Traffic Message Channel (RDS-TMC) ISO 14819-3, Traffic and Traveller Information (TTI) TTI messages via traffic message coding Part 3: Location referencing for ALERT-C EN 62106, Specification of the radio data system (RDS) for