ETSI TS 155 226-2017 Digital cellular telecommunications system (Phase 2+) (GSM) 3G Security Specification of the A5 4 Encryption Algorithms for GSM and ECSD and the GEA4 Encryptio.pdf

1、 ETSI TS 155 226 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS (3GPP TS 55.226 version 14.0.0 Release 14) TECHNICAL SPECIFICATION GLOBAL SYSTEM F

2、OR MOBILE COMMUNICATIONSRETSI ETSI TS 155 226 V14.0.0 (2017-04)13GPP TS 55.226 version 14.0.0 Release 14Reference RTS/TSGS-0355226ve00 Keywords GSM,SECURITY ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 -

3、NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electro

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9、 registered and owned by the GSM Association. ETSI ETSI TS 155 226 V14.0.0 (2017-04)23GPP TS 55.226 version 14.0.0 Release 14Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs

10、, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are avai

11、lable on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which ar

12、e, or may be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM id

13、entities. These should be interpreted as being references to the corresponding ETSI deliverables. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“

14、, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI

15、ETSI TS 155 226 V14.0.0 (2017-04)33GPP TS 55.226 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Technical provisions. 5g3Annex F (informative): Change history . 6g3History 7g3ETSI E

16、TSI TS 155 226 V14.0.0 (2017-04)43GPP TS 55.226 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG app

17、roval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3

18、 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction

19、In this document are specified three ciphering algorithms: A5/4 for GSM, A5/4 for ECSD, and GEA4 for GPRS (including EGPRS). The algorithms are stream ciphers that are used to encrypt/decrypt blocks of data under a confidentiality key KC. Each of these algorithms is based on the KASUMI algorithm tha

20、t is specified in TS 35.202 5. The three algorithms are all very similar. We first define a core keystream generator function KGCORE (clause 4); we then specify each of the three algorithms in turn (clauses 5, 6 and 7) in terms of this core function. Note that: - GSM A5/4 is the same algorithms as G

21、SM A5/3 but with KLEN changed from 64 to 128 bits. - and ECSD A5/4 is the same algorithms as ECSD A5/3 but with KLEN changed from 64 to 128 bits. - and GEA 4 is the same algorithms as GEA3 but with KLEN changed from 64 to 128 bits. ETSI ETSI TS 155 226 V14.0.0 (2017-04)53GPP TS 55.226 version 14.0.0

22、 Release 141 Scope This specification of the A5/4 encryption algorithms for GSM and ECSD, and of the GEA4 encryption algorithm for GPRS has been derived from TS 55.516 1: Specification of the A5/3 Encryption Algorithms for GSM and ECSD, and the GEA3 Encryption Algorithm for GPRS. The only essential

23、change is the change of external key length input from 64 bits to 128 bits. This document should be read in conjunction with the entire specification of the A5/3 and GEA3 algorithms: - Specification of the A5/3 Encryption Algorithms for GSM and ECSD, and the GEA3 Encryption Algorithm for GPRS. Docum

24、ent 1: A5/3 and GEA3 Specifications. - Specification of the A5/3 Encryption Algorithms for GSM and ECSD, and the GEA3 Encryption Algorithm for GPRS. Document 2: Implementors Test Data. - Specification of the A5/3 Encryption Algorithms for GSM and ECSD, and the GEA3 Encryption Algorithm for GPRS. Doc

25、ument 3: Design Conformance Test Data. The normative part of the specification of the block cipher (KASUMI) on which the A5/3, A5/4, GEA3 and GEA4 algorithms are based can be found in TS 35.202 5. 2 References The following documents contain provisions which, through reference in this text, constitu

26、te provisions of the present document. - References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific. - For a specific reference, subsequent revisions do not apply. - For a non-specific reference, the latest version applies. In the case of

27、 a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document. 1 to 5 (void) 6 3GPP Task Force Specification: “3G Security; Specification of the A5/4 Encryption Algorithms for

28、GSM and ECSD, and the GEA4 Encryption Algorithm for GPRS“, version 9.0.0. Note: Reference 6 is available via http:/www.etsi.org/WebSite/OurServices/Algorithms/algorithms.aspx and is subject to licensing conditions described at this site. 3 Technical provisions The technical provisons of the current

29、document are contained in the 3GPP Task Force Specification 6. ETSI ETSI TS 155 226 V14.0.0 (2017-04)63GPP TS 55.226 version 14.0.0 Release 14Annex F (informative): Change history Change history Date TSG # TSG Doc. CR Rev Subject/Comment Old New 02-2004 - - - - Draft presented to SA WG3 for agreemen

30、t - 0.1.0 03-2004 SA_23 SP-040170 - - Draft provided to TSG SA for information 0.1.0 1.0.0 09-2009 SA_45 SP-090647 - - Draft provided to TSG SA for approval 1.0.0 2.0.0 09-2009 SA_45 SP-090647 - - Approval at SA#45 and placement under CR control 2.0.0 9.0.0 2011-03 - - - - Update to Rel-10 version (

31、MCC) 9.0.0 10.0.0 2012-09 - - - - Update to Rel-11 version (MCC) 10.0.0 11.0.0 2014-09 - - - - Update to Rel-12 version (MCC) 11.0.0 12.0.0 2016-01 - - - - Update to Rel-13 version (MCC) 12.0.0 13.0.0 2017-03 SA#75 - - - Promotion to Release 14 without technical change 13.0.0 14.0.0 ETSI ETSI TS 155 226 V14.0.0 (2017-04)73GPP TS 55.226 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication