DIN EN ISO 14819-6-2007 Traffic and Traveller Information (TTI) - TTI messages via traffic message coding - Part 6 Encryption and conditional access for the Radio Data System - Tra.pdf

1、Mrz 2007DEUTSCHE NORM Normenausschuss Kraftfahrzeuge (FAKRA) im DINPreisgruppe 13DIN Deutsches Institut fr Normung e.V. Jede Art der Vervielfltigung, auch auszugsweise, nur mit Genehmigung des DIN Deutsches Institut fr Normung e.V., Berlin, gestattet.ICS 35.240.60!,kos“9727680www.din.deDDIN EN ISO 1

2、4819-6Verkehrs- und Reiseinformationen-TTI Meldungen ber Verkehrsmeldungscodierung Teil 6: Verschlsselung und Zugangsbedingungen fr das RadioDatensystem Verkehrsmeldungskanal ALERT C Kodierung(ISO 14819-6:2006);Englische Fassung EN ISO 14819-6:2006Traffic and Traveller Information (TTI) TTI messages

3、 via traffic message coding Part 6: Encryption and conditional access for the Radio Data System Traffic MessageChannel ALERT C coding (ISO 14819-6:2006);English version EN ISO 14819-6:2006Informations sur le trafic et le tourisme (TTI) Messages TTI via le codage de messages sur le trafic Partie 6: A

4、ccs au cryptage et accs conditionnel pour le systme de radiodiffusion dedonnes Codage ALERT C du canal de messages sur le traffic (ISO 14819-6:2006);Version anglaise EN ISO 14819-6:2006Alleinverkauf der Normen durch Beuth Verlag GmbH, 10772 Berlin www.beuth.deGesamtumfang 25 SeitenDIN EN ISO 14819-6

5、:2007-03 2 Nationales Vorwort Die Europische Norm EN ISO 14819-6 wurde vom Technischen Komitee CEN/TC 278 Straenverkehrstelematik“ unter deutscher Mitarbeit ausgearbeitet. Fr die deutsche Mitarbeit ist das Gemeinschaftskomitee GK 717 Straenverkehrstelematik“ im Normenausschuss Kraftfahrzeuge (FAKRA)

6、 zustndig. Das Prsidium des DIN hat mit seinem Beschluss 1/2004 festgelegt, dass von dem in den Regeln der europischen Normungsarbeit von CEN/CENELEC verankerten Grundsatz, wonach Europische Normen in den drei offiziellen Sprachen Deutsch, Englisch und Franzsisch verffentlicht werden, in begrndeten

7、Ausnahmefllen abgewichen und auf die deutsche Sprachfassung verzichtet werden kann. Fr die im Abschnitt 2 zitierten Internationalen Normen wird im Folgenden auf die entsprechenden Deutschen Normen hingewiesen: EN ISO 14819-1 siehe DIN EN ISO 14819-1 EN ISO 14819-2 siehe DIN EN ISO 14819-2 EN ISO 148

8、19-3 siehe DIN EN ISO 14819-3 EN 62106 siehe DIN EN 62106 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14819-6 April 2006 ICS 03.220.20; 35.240.60 English Version Traffic and Traveller Information (TTI) TTI messages via traffic message coding Part 6: Encryption and conditional access for

9、 the Radio Data System Traffic Message Channel ALERT C coding (ISO 14819-6:2006) Informations sur le trafic et le tourisme (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

10、messages sur le trafic (ISO 14819-6:2006) Verkehrs- und Reiseinformationen-TTI Meldungen ber Verkehrsmeldungscodierung Teil 6: Verschlsselung und Zugangsbedingungen fr das Radio Datensystem Verkehrsmeldungskanal ALERT C Kodierung (ISO 14819-6:2006) This European Standard was approved by CEN on 20 Ma

11、rch 2006. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obt

12、ained 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 language made by translation under the responsibility of a CEN member into its own language and notified to the Central Sec

13、retariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, P

14、ortugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in any form and by any

15、means reserved worldwide for CEN national Members. Ref. No. EN ISO 14819-6:2006: EEN ISO 14819-6:2006 (E) 2 Contents Page Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Symbols and abbreviations 7 5 Notation 8 6 Application description.8 6.1 Introduction to

16、 RDS group bit pattern and notation 8 6.2 RDS-TMC and Open Data Application .8 6.3 Summary of TMC data elements in type 8A groups 11 7 Principles of the Encryption and Conditional Access methodology 12 8 Encryption by the service provider. 13 8.1 Service providers requirements. 13 8.2 Use of type 8A

17、 groups for RDS-TMC encryption. 13 8.3 Encryption Administration group . 14 8.4 Encrypting location codes. 16 9 Access to decrypted services by a terminal 17 9.1 Terminal manufacturers basic requirements 17 9.2 Activation of a terminal 18 9.3 Identifying an encrypted RDS-TMC service . 19 9.4 Decrypt

18、ing location codes. 19 10 Introduction of Encrypted services 20 10.1 Terminal responses 21 10.2 De facto strategy valid only for service providers wishing to generate revenue, prior to general availability of encryption 21 10.3 Actions for existing providers of unencrypted TMC services . 22 10.4 Act

19、ions for potential providers of TMC services. 22 10.5 Timescales. 22 Bibliography. 23 EN ISO 14819-6:2006 (E) 3 Foreword This document (EN ISO 14819-6:2006) has been prepared by Technical Committee CEN/TC 278 “Road transport and traffic telematics“, the secretariat of which is held by NEN, in collab

20、oration 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, at the latest by October 2006, and conflicting national standards shall be w

21、ithdrawn 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hung

22、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 14819-6:2006 (E) 4 Introduction Traffic and traveller information may be disseminated through a number of serv

23、ices or means of communication. For such services, the data to be disseminated and the message structure 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 specificat

24、ion for TTI messages within Europe and elsewhere is RDS-TMC, specified in Parts 1, 2 and 3 of EN ISO 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 dissemin

25、ating TTI data free-to-air, using a public-service model. However, in many countries, the adoption and 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

26、 intermediaries to receive and use the data. In this model, a convenient way that this may be achieved 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,

27、the European receiver industry asked the TMC Forum to establish a Task Force to recommend a single method 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

28、 and guidelines; no, or only minimal, overhead in terms of data capacity required for encryption; no 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

29、fee; applicability to both lifetime and term subscription business models; ability of terminals to be 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-d

30、etermined criteria the task force had established. The method encrypts the 16 bits that form the Location 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 ha

31、cker. More secure systems were rejected because of the RDS capacity overhead that was required. After 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 a

32、s a specification to be submitted for standardization. The group was also requested to produce guidelines for service providers and terminal manufacturers to aid implementation of the specification. This International Standard describes a non-proprietary light encryption and conditional access syste

33、m that allows commercial models for RDS-TMC to exist. The reader is assumed to have a pre-existing understanding of, and familiarity with, the RDS and RDS-TMC standards and implementation guidelines. EN ISO 14819-6:2006 (E) 5 1 Scope This document establishes a method of encrypting certain elements

34、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 is able to decrypt the data, the terminal requires two “keys”. The first is given in

35、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 International Standard explains the purpose of the two keys and how often and when the tra

36、nsmitted 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 access rights to each service and subscription period, allowing both lifetime and ter

37、m 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 based on public “Location Tables” or a commercial service based on a proprietary Location

38、 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 indispensable for the application of this document. For dated references, only the edition cite

39、d 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 1: Coding protocol for Radio Data System Traffic Message Channel (RDS-TMC) using ALER

40、T-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 r

41、eferencing for ALERT-C EN 62106, Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87, 5 to 108, 0 MHz (IEC 62106:2000) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 Access Profile ACP a

42、particular service and subscription period 3.2 Country Code CC code assigned to a country to be transmitted as the first four bits of the transmitted PI code in a broadcast RDS service EN 62106 EN ISO 14819-6:2006 (E) 6 3.3 Encryption Identifier ENCID value indicating which line in the Service Key t

43、able of parameters the service provider is using in the encryption process that day NOTE ENCID is transmitted in type 8A groups. 3.4 Event Description details of the road situation, general or specific traffic problems, and other factors (e.g. weather) affecting or potentially affecting the passage

44、of vehicles on the roads and highways network 3.5 Expiry Date date determined by the service provider on which a particular terminals ability to decrypt an encrypted service should cease (i.e. end of the paid subscription period) 3.6 Location area, highway segment or point location where the source

45、of the problem is situated 3.7 Location Code numeric or alphanumeric representation of a location according to a pre-determined database, known as a Location Table 3.8 Location Table Number LTN number with the value 0 to 63 used to identify the Location Table used by the service provider. NOTE 1 The

46、 LTN is generally allocated to each service provider in a country by the relevant government or roads authority from a range assigned to that country. It is transmitted in type 3A groups. NOTE 2 Value 0, when transmitted in type 3A groups, shows that the service provider is encrypting the location c

47、odes transmitted in the manner described in this International Standard. 3.9 Location Table Number Before Encryption LTNBE number with the value 1 to 63 used to identify the Location Table used by the service provider prior to the codes within the table being encrypted for transmission NOTE LTNBE is

48、 transmitted in type 8A groups. 3.10 Other Network ON notation appended in drawings, where necessary, to indicate that the code being transmitted e.g. SID (ON) relates not to the Tuned Service, but to a referenced Other Network NOTE Data about the Other Network(s) can be pre-stored in terminal equip

49、ment. 3.11 PIN code numeric or alphanumeric code required to be entered into a terminal before that terminal is permitted to present decrypted RDS-TMC messages EN ISO 14819-6:2006 (E) 7 NOTE The value of the PIN code is calculated by the terminal manufacturer from an algorithm using terminal serial number and one or more application profiles as factors. 3.12 Serial Number alphanumeric identifier, unique to a terminal (or group of terminals), determined by the manufacturer 3.13 S