1、 ISO/IEC 24767-2 Edition 1.0 2009-01 INTERNATIONAL STANDARD Information technology Home network security Part 2: Internal security services Secure communication protocol for middleware (SCPM) ISO/IEC 24767-2:2009(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 ISO/IEC, Geneva, Switzerland
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9、009-01 INTERNATIONAL STANDARD Information technology Home network security Part 2: Internal security services Secure communication protocol for middleware (SCPM) INTERNATIONAL ELECTROTECHNICAL COMMISSION R ICS 35.200 PRICE CODE ISBN 2-8318-1020-6 2 24767-2 ISO/IEC:2009(E) CONTENTS FOREWORD.5 1 Scope
10、.6 2 Normative references .6 3 Terms, definitions and abbreviations 7 3.1 Terms and definitions 7 3.2 Abbreviations 8 4 Conformance8 5 Design considerations of internal security services for home networks .9 5.1 General .9 5.2 Issues addressed by security measures 10 5.2.1 General .10 5.2.2 Unsafe t
11、ransmission 10 5.2.3 Intentional misuse .10 5.3 Design principles of security measures11 5.3.1 General .11 5.3.2 Minimization of resources for cost-saving 11 5.3.3 Independence of communication media .11 5.3.4 Independence of cryptographic algorithms.11 5.3.5 Extensibility of variant usages .11 6 Se
12、cure communication protocol for middleware (SCPM).11 6.1 General .11 6.2 What is SCPM.12 6.3 How does SCPM work.12 6.4 Where is SCPM going to be implemented14 6.5 Usage levels of SCPM.14 6.6 Usage keys of SCPM.15 7 Secure message frame format15 7.1 General communication frame.15 7.1.1 General .15 7.
13、1.2 Header (HD)16 7.1.3 Source address (SA) and destination address (DA) .16 7.1.4 Byte counter (BC)16 7.1.5 Application Data (ADATA) .16 7.2 Secure frame structure16 7.2.1 General .16 7.2.2 Secure header (SHD) 17 7.2.3 Sequence number field (SNF)18 7.2.4 Plain text data part byte counter (PBC)18 7.
14、2.5 Plain text application data (PADATA).18 7.2.6 Block check code (BCC) 18 7.2.7 Padding (PDG) 18 7.2.8 Message data authentication signature (MDAS).19 8 SCPM processing.19 8.1 Algorithms and processing 19 24767-2 ISO/IEC:2009(E) 3 8.1.1 General .19 8.1.2 Encryption algorithms and encryption calcul
15、ation.19 8.1.3 Data authentication algorithms and data authentication calculation19 8.1.4 Cipher block chaining (CBC) mode 20 8.1.5 SNF initialisation and verification.20 8.1.6 Initialisation vector (IV) value 21 8.2 Secure message frame processing22 8.2.1 General .22 8.2.2 Message frame processing
16、of data authentication only 22 8.2.3 Message frame processing of confidentiality only 23 8.2.4 Message frame processing of data authentication and confidentiality 25 9 Key management27 9.1 General .27 9.2 Key initialisation 27 9.2.1 Initialisation of a user key27 9.2.2 Initialisation of service prov
17、ider keys .30 9.2.3 Initialisation of maker key 32 9.3 Master key update.32 9.3.1 Master key update between KSN and a device 32 9.3.2 Key synchronization 36 9.3.3 Master key update request from a device 38 Annex A (informative) To authorize a key setting node.41 Bibliography42 Figure 1 Use of combin
18、ed technologies against security risks10 Figure 2 General message frame versus secure message frame13 Figure 3 Round trip communications of SCPM .13 Figure 4 Position of SCPM.14 Figure 6 Secure message frame 17 Figure 7 Data format of a secure header (SHD) .17 Figure 8 Encryption employing AES-CBC w
19、ith 128-bit key .19 Figure 9 Data authentication calculation 20 Figure 10 Sequences of SNF initialisation21 Figure 11 Calculation of IV value .21 Figure 13 Secure message frames employing encryption service.25 Figure 14 Secure message frames employing encryption and data authentication services 27 F
20、igure 15 Sequences of user key initialisation .29 Figure 16 Secure message frames of “user key” initialisation.30 Figure 17 Sequences of service provider key initialisation31 Figure 19 Sequences of master key updates controlled by KSN using the DH algorithm 34 Figure 21 Secure message frames of mast
21、er key update Key exchange using DH shared secret key .36 Figure 22 Sequences of master key update for synchronization .37 Figure 23 A state transition diagram of a device during master key update controlled by KSN .38 4 24767-2 ISO/IEC:2009(E) Figure 24 Sequences of master key update requested from
22、 a device .39 Figure 25 A state transition diagram of a device when master key update is requested from the device.40 Figure A.1 An example to authenticate the KSN.41 24767-2 ISO/IEC:2009(E) 5 INFORMATION TECHNOLOGY HOME NETWORK SECURITY Part 2: Internal security services Secure communication protoc
23、ol for middleware (SCPM) FOREWORD 1) ISO (International Organization for Standardization) and IEC (International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Stan
24、dards. Their preparation is entrusted to technical committees; any ISO and IEC member body interested in the subject dealt with may participate in this preparatory work. International governmental and non-governmental organizations liaising with ISO and IEC also participate in this preparation. 2) I
25、n the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least
26、75 % of the national bodies casting a vote. 3) The formal decisions or agreements of IEC and ISO on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC and ISO membe
27、r bodies. 4) IEC, ISO and ISO/IEC publications have the form of recommendations for international use and are accepted by IEC and ISO member bodies in that sense. While all reasonable efforts are made to ensure that the technical content of IEC, ISO and ISO/IEC publications is accurate, IEC or ISO c
28、annot be held responsible for the way in which they are used or for any misinterpretation by any end user. 5) In order to promote international uniformity, IEC and ISO member bodies undertake to apply IEC, ISO and ISO/IEC publications transparently to the maximum extent possible in their national an
29、d regional publications. Any divergence between any ISO/IEC publication and the corresponding national or regional publication should be clearly indicated in the latter. 6) ISO and IEC provide no marking procedure to indicate their approval and cannot be rendered responsible for any equipment declar
30、ed to be in conformity with an ISO/IEC publication. 7) All users should ensure that they have the latest edition of this publication. 8) No liability shall attach to IEC or ISO or its directors, employees, servants or agents including individual experts and members of their technical committees and
31、IEC or ISO member bodies for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication of, use of, or reliance upon, this ISO/IEC publication or any other IEC, ISO or ISO/
32、IEC publications. 9) Attention is drawn to the normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 10) Attention is drawn to the possibility that some of the elements of this International Standard may b
33、e the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent rights. International Standard ISO/IEC 24767-2 was prepared by subcommittee 25: Interconnection of information technology equipment, of ISO/IEC joint technical committee 1: Information te
34、chnology. The list of all currently available parts of ISO/IEC 24767 series, under the general title Information technology Home network security, can be found on the IEC web site. This International Standard has been approved by vote of the member bodies, and the voting results may be obtained from
35、 the address given on the second title page. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. 6 24767-2 ISO/IEC:2009(E) INFORMATION TECHNOLOGY HOME NETWORK SECURITY Part 2: Internal security services Secure communication protocol for middleware (SCPM) 1 Scope This
36、 part of ISO/IEC 24767 specifies security in a home network for equipment with limited IT capability. The Secure Communication Protocol for Middleware (SCPM) is particularly designed to support network security (see 5.2) for equipment not capable of supporting Internet security protocols such as IPS
37、ec or SSL/TLS. Although this protocol is designed for unsafe transmissions, it may be used on other types of transmissions. Of course, the quality level of the security services of SCPM is not equal with that of the Internet security protocols but will ensure that such middleware can also be connect
38、ed securely within a home. It is not the intention that SCPM replace existing security mechanisms of protocols that have already been published. The SCPM provides the security services at the network layer and the protocol does not rely on any specific media transmission. This part of ISO/IEC 24767
39、contains detailed specifications of the security services supported, the necessary message formats, the information flows and the processing of these pieces of information necessary for the implementation of this protocol. Therefore, this standard neither addresses media-dependent issues nor an over
40、all security architecture covering every home-networking technology. The protocol specified in this standard is media-independent and covers the security services for the network layer for protocols that do not have a conflicting network-layer addressing scheme. Network layer security services are p
41、rovided through the use of a combination of cryptographic and security mechanisms. Each protocol should specify the details of this security implementation. An HES system supporting more than one protocol needs a gateway in between protocols. Finally, this standard does not define any type of applic
42、ation except for key management which has become essential in any security service. Nonetheless, there are no restrictions on which types of applications may be deployed with SCPM. 2 Normative references The following referenced documents are indispensable for the application of this document. For d
43、ated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO/IEC 10116, Information technology Security techniques Modes of operation for an n- bit block cipher ISO/IEC 11577, Information technology Ope
44、n Systems Interconnection Network layer security protocol ISO/IEC 11770-3, Information technology Security techniques Key management Part 3: Mechanisms using asymmetric techniques ISO/IEC 18033-3, Information technology Security techniques Encryption algorithms Part 3: Block ciphers 24767-2 ISO/IEC:
45、2009(E) 7 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the purpose of this document the following definitions apply. 3.1.1 confidentiality property that information is not made available or disclosed to unauthorized individuals, entities or processes 3.1.2 data authentication
46、 service used to ensure that the source of the data claimed by a party to a communication is correctly verified 3.1.3 data integrity property that data has not been altered or destroyed in an unauthorized manner 3.1.4 key setting node entity responsible for key generation/distribution and management
47、 3.1.5 MAC address media access control sub-layer of the data-link layer of the communications protocol used 3.1.6 message frame minimum data unit transmitted between a home appliance node and a home appliance control 3.1.7 out of band use of other mechanisms than the ones required on a communicatio
48、ns channel to transmit information 3.1.8 requested service networked node that responds to service requests 3.1.9 service requester networked node that issues service requests 3.1.10 user authentication service used to ensure that the identity claimed by a party to a communication is correctly verif
49、ied, whereas an authorization service ensures that the identified and authenticated party is entitled to access a particular device or application on the home network 3.1.11 white goods appliances that are used daily life, for example, air conditioner, refrigerator and so on 8 24767-2 ISO/IEC:2009(E) 3.2 Abbreviations For the purpose of this document the following abbreviations apply. ADATA Application DATA ( 7.1.5) BC Byte Counter data leng
