1、 ETSI TS 155 253 V14.0.0 (2017-04) Digital cellular telecommunications system (Phase 2+) (GSM); Specification of the GEA5 encryption and GIA5 integrity algorithms for General Packet Radio Service (GPRS); Design conformance test data (3GPP TS 55.253 version 14.0.0 Release 14) TECHNICAL SPECIFICATION
2、GLOBAL SYSTEM FOR MOBILE COMMUNICATIONSRETSI ETSI TS 155 253 V14.0.0 (2017-04)13GPP TS 55.253 version 14.0.0 Release 14Reference RTS/TSGS-0355253ve00 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 6
3、23 562 00017 - 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
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7、al, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications St
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9、are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 155 253 V14.0.0 (2017-04)23GPP TS 55.253 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
10、 essential IPRs, 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 u
11、pdates are available 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 s
12、erver) which are, 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 ident
13、ities or GSM identities. 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
14、 not“, “should“, “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
15、citation. ETSI ETSI TS 155 253 V14.0.0 (2017-04)33GPP TS 55.253 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviation
16、s . 5g34 Introductory information 5g34.1 Introduction 5g34.2 Notation 6g34.2.1 Radix . 6g34.2.2 Conventions 6g34.2.3 Bit/Byte ordering 6g34.3 List of Variables . 6g35 Design conformance test data . 7g3Annex A (informative): Change history . 8g3History 9g3ETSI ETSI TS 155 253 V14.0.0 (2017-04)43GPP T
17、S 55.253 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the conte
18、nts 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 or greater indicates TSG approved doc
19、ument 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 The present document has been prepared
20、 by the 3GPP Task Force, and gives a detailed specification of the 3GPP encryption algorithm GEA5 and integrity algorithm GIA5. The present document is the second of three, which between them form the entire specification of the 3GPP encryption algorithm GEA5 and integrity algorithm GIA5: - 3GPP TS
21、55.251: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Specification of the GEA5 encryption and GIA5 integrity algorithms for GPRS; GEA5 and GIA5 specification“. - 3GPP TS 55.252: “3rd Generation Partnership Project; Technical Specification Group Serv
22、ices and System Aspects; Specification of the GEA5 encryption and GIA5 integrity algorithms for GPRS; Implementers test data“. - 3GPP TS 55.253: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Specification of the GEA5 encryption and GIA5 integrity alg
23、orithms for GPRS; Design conformance test data“. ETSI ETSI TS 155 253 V14.0.0 (2017-04)53GPP TS 55.253 version 14.0.0 Release 141 Scope The present document defines the design conformance test data of the 3GPP encryption algorithm GEA5 and integrity algorithm GIA5. 2 References The following documen
24、ts contain provisions which, through reference in this text, constitute 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
25、 a non-specific reference, the latest version applies. In the case of 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 3GPP TR 21.905: “Vocabulary for 3GPP Speci
26、fications“. 2 3GPP TS 55.251: “Specification of the GEA5 and GIA5 encryption algorithms for GPRS; GEA5 and GIA5 specification“. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 1 and the following apply. A ter
27、m defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 1. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 1 and the following apply. An abbreviation defined in the present document takes
28、 precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 1. 4 Introductory information 4.1 Introduction The confidentiality algorithm GEA5 is a stream cipher that is used to encrypt/decrypt blocks of data under a confidentiality key KC128. The block of data may be between
29、1 and 65536 octets long. The algorithm uses SNOW 3G 2 as a keystream generator The integrity algorithm GIA5 computes a 32-bit MAC (Message Authentication Code) of a given input message using an integrity key KI128. The approach adopted uses SNOW 3G. ETSI ETSI TS 155 253 V14.0.0 (2017-04)63GPP TS 55.
30、253 version 14.0.0 Release 144.2 Notation 4.2.1 Radix The prefix “0x“ is used to indicate hexadecimal numbers. 4.2.2 Conventions The assignment operator “=“, is used as in several programming languages. So: = means that assumes the value that had before the assignment took place. For instance: x = x
31、 + y + 3 means: (new value of x) becomes (old value of x) + (old value of y) + 3. 4.2.3 Bit/Byte ordering All data variables in the present document are presented with the most significant bit (or byte) on the left hand side and the least significant bit (or byte) on the right hand side. Where a var
32、iable is broken down into a number of sub-strings, the left most (most significant) sub-string is numbered 0, the next most significant is numbered 1 and so on through to the least significant. For example an n-bit MESSAGE is subdivided into 64-bit substrings MB0,MB1MBiso for a message: 0x0123456789
33、ABCDEFFEDCBA987654321086545381AB594FC28786404C50A37 is: MB0= 0x0123456789ABCDEF MB1= 0xFEDCBA9876543210 MB2= 0x86545381AB594FC2 MB3= 0x8786404C50A37 In binary this would be: 000000010010001101000101011001111000100110101011110011011110111111111110 with MB0 = 000000010010001101000101011001111000100110
34、1010111100110111101111 MB1 = 1111111011011100101110101001100001110110010101000011001000010000 MB2 = 1000011001010100010100111000000110101011010110010100111111000010 MB3 = 1000011110000110010000000100110001010000101000110111 4.3 List of Variables CONSTANT-F a 32-bit parameter which is constant for an
35、y given FRAMETYPE input. DIRECTION the 1-bit input to both the GEA5 and GIA5 functions indicating the direction of transmission (uplink or downlink). FRAMETYPE an 8-bit input to the GEA5 and GIA5 functions indicating the type of frame to be protected. INPUT the 32-bit time variant input to the GEA5
36、function. INPUT-I the 32-bit time variant input to the GIA5 function. KC128 the 128-bit confidentiality key. ETSI ETSI TS 155 253 V14.0.0 (2017-04)73GPP TS 55.253 version 14.0.0 Release 14KI128 the 128-bit integrity key. KSi the ith bit of keystream produced by the keystream generator. L the number
37、of 32-bit words of SNOW 3G keystream that are generated by GEA5 (equal to i1M / 4i1 ). LENGTH a 64 bit parameter defined within GIA5 which specifies the number of bits of message to be MACd (equal to 8 times M). M the input to the GEA5 function which specifies the number of octets of output required
38、 (1-65536); also the input to the GIA5 function which specifies the number of octets of message to be MAC (1-65536). MAC the 32-bit message authentication code (MAC) produced by the integrity function GIA5. MESSAGE the input bitstream of LENGTH bits that is to be processed by the GIA5 function. OUTP
39、UT the output octets from the GEA5 function. S1, S2, a sequence of 64-bit words derived from MESSAGE and LENGTH which is used within GIA5 to construct the MAC. z1, z2, the 32-bit words forming the keystream sequence of SNOW 3G. The word produced first is z1, the next word z2 and so on. 5 Design conf
40、ormance test data This clause only available under licence. See http:/www.etsi.org/about/what-we-do/security-algorithms-and-codes/cellular-algorithm-licences. ETSI ETSI TS 155 253 V14.0.0 (2017-04)83GPP TS 55.253 version 14.0.0 Release 14Annex A (informative): Change history Change history Date Meet
41、ing TDoc CR Rev Cat Subject/Comment New version 2017-03 SA#75 SP-170091 Presented for approval 2.0.0 2017-03 SA#75 Upgrade to change control version 13.0.0 2017-03 SA#75 - - - Promotion to Release 14 without technical change 14.0.0 ETSI ETSI TS 155 253 V14.0.0 (2017-04)93GPP TS 55.253 version 14.0.0 Release 14History Document history V14.0.0 April 2017 Publication
