1、 International Telecommunication Union ITU-T X.1242TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/2009) SERIES X: DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY Cyberspace security Countering spam Short message service (SMS) spam filtering system based on user-specified rules Recommenda
2、tion ITU-T X.1242 ITU-T X-SERIES RECOMMENDATIONS DATA NETWORKS, OPEN SYSTEM COMMUNICATIONS AND SECURITY PUBLIC DATA NETWORKS X.1X.199 OPEN SYSTEMS INTERCONNECTION X.200X.299 INTERWORKING BETWEEN NETWORKS X.300X.399 MESSAGE HANDLING SYSTEMS X.400X.499DIRECTORY X.500X.599 OSI NETWORKING AND SYSTEM ASP
3、ECTS X.600X.699 OSI MANAGEMENT X.700X.799 SECURITY X.800X.849 OSI APPLICATIONS X.850X.899 OPEN DISTRIBUTED PROCESSING X.900X.999 INFORMATION AND NETWORK SECURITY General security aspects X.1000X.1029 Network security X.1030X.1049 Security management X.1050X.1069 Telebiometrics X.1080X.1099 SECURE AP
4、PLICATIONS AND SERVICES Multicast security X.1100X.1109 Home network security X.1110X.1119 Mobile security X.1120X.1139 Web security X.1140X.1149 Security protocols X.1150X.1159 Peer-to-peer security X.1160X.1169 Networked ID security X.1170X.1179 IPTV security X.1180X.1199 CYBERSPACE SECURITY Cyber
5、security X.1200X.1229 Countering spam X.1230X.1249 Identity management X.1250X.1279 SECURE APPLICATIONS AND SERVICES Emergency communications X.1300X.1309 Ubiquitous sensor network security X.1310X.1339 For further details, please refer to the list of ITU-T Recommendations. Rec. ITU-T X.1242 (02/200
6、9) i Recommendation ITU-T X.1242 Short message service (SMS) spam filtering system based on user-specified rules Summary Recommendation ITU-T X.1242 describes the realization of the SMS spam filtering system based on user-specified rules. It defines the structure of SMS spam filtering system, SMS sp
7、am filtering functions, users service management, communication protocols and basic functional requirements of terminals with SMS functions. Source Recommendation ITU-T X.1242 was approved on 20 February 2009 by ITU-T Study Group 17 (2009-2012) under the WTSA Resolution 1 procedure. Keywords Filteri
8、ng system, SMS, SMS spam, SMS spam filtering system based on user-specified rules. ii Rec. ITU-T X.1242 (02/2009) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). T
9、he ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Stand
10、ardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information
11、 technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Co
12、mpliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some other
13、obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implemen
14、tation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. A
15、s of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urge
16、d to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2009 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T X.1242 (02/2009) iii CONTENTS Page 1 Scope 1 2 References. 1 3 Definitio
17、ns 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Recommendation. 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 System description 3 7 System structure . 3 7.1 General structure 3 7.2 Module requirements 4 7.3 Device requirements. 6 8 SMS spam filtering function. 6 8.1 SMS working mo
18、des 6 8.2 Realization of SMS spam filtering . 7 9 Users service management. 9 9.1 Management methods. 9 9.2 Management capability 11 10 Communication protocols. 12 10.1 Structure of communication protocols . 12 10.2 Authentication protocol 13 10.3 ISMG protocol 13 Appendix I Requirements of terminal
19、 software supporting the SMS spam filtering 14 I.1 General aspects. 14 I.2 Basic software for SMS spam filtering 14 I.3 Enhanced software for SMS spam filtering 15 Bibliography. 16 iv Rec. ITU-T X.1242 (02/2009) Introduction With the increasing popularization of mobile services, SMS has become one o
20、f the most profitable value-added services due to low price, excellent flexibility and easy usage. However, at the same time, SMS spam is growing rapidly and is bringing the following serious influences: reducing users satisfaction about SMS wasting network resources increasing social instability br
21、inging other negative influences. Therefore, it is very important to find an effective and efficient solution to counter SMS spam while maintaining the operational efficiency of SMS. However, the following principles should be taken into account: minimize changes to the user SMS interface improve th
22、e users confidence in the SMS be easy to implement and deploy minimize changes to the existing network system Based on the above principles, the SMS spam filtering system based on user-specified rules is an effective and efficient way to counter SMS spam. It means to establish a SMS spam filtering s
23、ystem, in which users can manage SMS filtering rules and entrust the system that belongs to the service provider or the network operator to block the correlative short messages. The system has the following merits: protect the users privacy through user-specified rules meet the users requirements on
24、 countering SMS spam implement easily without changing the existing network systems run as a value-added service which can bring profits for service providers This Recommendation is suitable for the design, deployment and evaluation of SMS spam filtering system based on user-specified rules in mobil
25、e networks and fixed networks. Rec. ITU-T X.1242 (02/2009) 1 Recommendation ITU-T X.1242 Short message service (SMS) spam filtering system based on user-specified rules 1 Scope This Recommendation describes the realization of the SMS spam filtering system based on user-specified rules (hereafter ref
26、erred to as the SMS spam filtering system or the filtering system). It defines: the structure of the filtering system the SMS spam filtering functions users service management communication protocols functional requirements of the terminal This Recommendation is suitable for the design, deployment a
27、nd evaluation of SMS spam filtering system based on user-specified rules in mobile networks and fixed networks. NOTE Some filtering mechanisms described in this Recommendation may affect the privacy of telecommunication traffic. Therefore, implementations of SMS spam filtering systems have to take c
28、are to be in alignment with the applicable legislations. This Recommendation or parts of it may not be applicable in Germany due to German legislation. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provision
29、s of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations a
30、nd other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. ETSI TR 101 632 ETSI TR 101 632 V7.0.0 (2000-06), Digital
31、cellular telecommunications system (Phase 2+) (GSM); Interface protocols for the connection of Short Message Service Centres (SMSCs) to Short Message Entities (SMEs) (GSM 03.39 version 7.0.0 Release 1998). 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined
32、 elsewhere: 3.1.1 mobile station (MS): Entity capable of accessing a set of UMTS services via one or more radio interfaces. This entity may be stationary or in motion within the UMTS service area while accessing the UMTS services, and may simultaneously serve one or more users. b-ETSI TR 125 990. 3.
33、1.2 short message: Information that is conveyed from a sending user to a receiving user via an SMSC. b-ETSI TS 102 507. 2 Rec. ITU-T X.1242 (02/2009) 3.1.3 short message entity (SME): The SME is an entity that composes and decomposes short messages. A SME may or may not be located within, and be ind
34、istinguishable from, an HLR, MC, VLR, MS, or MSC. b-ITU-T Q.1742.3. 3.1.4 short message service centre (SMSC): Function unit, which is responsible for the relaying and store-and-forwarding of a short message (SM) between two SM-TEs or SME and an MS. The SMSC can functionally be separated from or int
35、egrated in the network. b-ETSI ES 201 986. 3.1.5 SMS-DELIVER: Short message transfer protocol data unit containing user data (the short message), being sent from an SC to an MS. b-ETSI TS 100 901. 3.1.6 SMS-STATUS-REPORT: Short message transfer protocol data unit informing the receiving MS of the st
36、atus of a mobile originated short message previously submitted by the MS, i.e., whether the SC was able to forward the message or not, or whether the message was stored in the SC for later delivery. b-ETSI TS 100 901. 3.1.7 SMS-SUBMIT: Short message transfer protocol data unit containing user data (
37、the short message), being sent from an MS to an SC. b-ETSI TS 100 901. 3.1.8 status report: SC informing the originating MS of the outcome of a short message submitted to an SME. b-ETSI TS 100 901. 3.2 Terms defined in this Recommendation This Recommendation defines the following terms: 3.2.1 Intern
38、et short message gateway (ISMG): The entity between the SP and SMSC, implementing the transportation of short messages from the SP to the SMSC and from the SMSC to the SP, while implementing protocol conversion of interactive information between the SP and the SMSC. 3.2.2 short message service (SMS)
39、: The services in telecommunication networks, which provide mobile phones, telephones and other SMEs to transfer and receive text messages through SMSCs that store messages if the receiving terminal cannot be contacted. 3.2.3 spam: The electronic information delivered from senders to recipients by t
40、erminals such as computers, mobile phones, telephones, etc., which is usually unsolicited, unwanted, and harmful for recipients. 3.2.4 SMS spam: Spam sent via SMS. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: FMD Filtered Messages Database ISMG Inte
41、rnet Short Message Gateway MS Mobile Station SC Service Centre SCM Service Control Module SM MO Short Message Mobile Originated Point-to-Point SM MT Short Message Mobile Terminated Point-to-Point SME Short Message Entity SMPP Short Message Point-to-Point SMS Short Message Service Rec. ITU-T X.1242 (
42、02/2009) 3 SMSC Short Message Service Centre SP Service Provider SS Secretary Station SSFM SMS Spam Filtering Module SSFS SMS Spam Filtering Service URD User-specified Rules Database USMM User Service Management Module 5 Conventions None. 6 System description SMS spam filtering system based on user-
43、specified rules refers to a filtering system attached to SMSCs, in which users can configure (add, delete and edit) filtering rules, and at the same time, all short messages to such users can be filtered according to those filtering rules. In addition, users can manage (query, delete and restore) fi
44、ltered short messages by specified methods. Filtering rules can be based on address (phone number), time, content, etc. In addition, specific filtering rules can be used individually or in combination with other filtering rules. If filtering rules are used in combination with other filtering rules,
45、prioritization of the filtering rules is one of the necessary steps implicit in setting the rules. In order to be used easily and practically for this service, at least one of the following management methods for users should be provided: SMS, Web and secretary station. 7 System structure 7.1 Genera
46、l structure The SMS spam filtering system includes the following logical modules: service control module (SCM), SMS spam filtering module (SSFM), user service management module (USMM), user-specified rules database (URD) and filtered messages database (FMD). The structure of the SMS spam filtering s
47、ystem is shown in Figure 1: 4 Rec. ITU-T X.1242 (02/2009) X.1242(09)_F01SSFM USMMSCMSMSCURD FMDFigure 1 Structure of the SMS spam filtering system According to the locations, the above 5 modules in Figure 1 can be put into 3 layers: the access layer, the service layer and the data layer. The access
48、layer includes the SCM; the service layer includes the USMM and the SSFM; the data layer includes the URD and the FMD. 7.2 Module requirements 7.2.1 Access layer The access layer, the outer layer, is connected to the SMSC directly and is mainly responsible for external entities (including users) acc
49、essing the filtering system. 7.2.1.1 Service control module (SCM) SCM is an integrated service management platform of the filtering system, which includes the following functions: Query of service subscription: SMS spam filtering is a kind of optional services for users. Therefore, any short message should be queried in the SCM before being transferred to determine whether the recipient has the service subscription for SMS spam filtering service or not. If so, the short message will be delivered
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