ETSI TS 135 201-2017 Universal Mobile Telecommunications System (UMTS) LTE 3G Security Specification of the 3GPP confidentiality and integrity algorithms Document 1 f8 and f9 speci.pdf

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1、 ETSI TS 135 201 V14.0.0 (2017-04) Universal Mobile Telecommunications System (UMTS); LTE; 3G Security; Specification of the 3GPP confidentiality and integrity algorithms; Document 1: f8 and f9 specification (3GPP TS 35.201 version 14.0.0 Release 14) TECHNICAL SPECIFICATION ETSI ETSI TS 135 201 V14.

2、0.0 (2017-04)13GPP TS 35.201 version 14.0.0 Release 14Reference RTS/TSGS-0335201ve00 Keywords LTE,SECURITY,UMTS 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 - NAF 742 C Association but non lucratif enregi

3、stre 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 electronic and/or print versions of the present docu

4、ment shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive with

5、in ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the prese

6、nt document, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorize

7、d 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 Standards Institute 2017. All rights reserved. DECTTM, PLUGTES

8、TSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members GSM and the GSM logo are

9、Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 135 201 V14.0.0 (2017-04)23GPP TS 35.201 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 ess

10、ential 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 updat

11、es 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 serve

12、r) 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 identitie

13、s 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 not

14、“, “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 cita

15、tion. ETSI ETSI TS 135 201 V14.0.0 (2017-04)33GPP TS 35.201 version 14.0.0 Release 14Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g3Introduction 4g30 Scope 6g3NORMATIVE SECTION 7g31 Outline of the normative part . 8g31.1 References 8g32 Introductory i

16、nformation 9g32.1 Introduction 9g32.2 Notation 9g32.2.1 Radix . 9g32.2.2 Conventions 9g32.2.3 Bit/Byte ordering 9g32.2.4 List of Symbols . 10g32.3 List of Variables . 10g33 Confidentiality algorithm f8 . 11g33.1 Introduction 11g33.2 Inputs and Outputs 11g33.3 Components and Architecture 11g33.4 Init

17、ialisation 12g33.5 Keystream Generation 12g33.6 Encryption/Decryption . 12g34 Integrity algorithm f9 13g34.1 Introduction 13g34.2 Inputs and Outputs 13g34.3 Components and Architecture 13g34.4 Initialisation 13g34.5 Calculation . 14g3INFORMATIVE SECTION . 15g3Annex 1 (informative): Figures of the f8

18、 and f9 Algorithms 16g3Annex 2 (informative): Simulation Program Listing . 18g3Annex 3 (informative): Change history . 22g3History 23g3ETSI ETSI TS 135 201 V14.0.0 (2017-04)43GPP TS 35.201 version 14.0.0 Release 14Foreword This Technical Specification has been produced by the 3rdGeneration Partnersh

19、ip Project (3GPP). The 3GPP Confidentiality and Integrity Algorithms f8 2 presented to TSG for approval; 3 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 th

20、ird digit is incremented when editorial only changes have been incorporated in the document. Introduction This specification has been prepared by the 3GPP Task Force, and gives a detailed specification of the 3GPP confidentiality algorithm f8, and the 3GPP integrity algorithm f9. This document is th

21、e first of four, which between them form the entire specification of the 3GPP Confidentiality and Integrity Algorithms: - 3GPP TS 35.201: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integri

22、ty Algorithms; Document 1: f8 and f9 Specification“. - 3GPP TS 35.202: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integrity Algorithms; Document 2: KASUMI Specification“. - 3GPP TS 35.203:

23、 “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integrity Algorithms; Document 3: Implementors Test Data“. - 3GPP TS 35.204: “3rd Generation Partnership Project; Technical Specification Group

24、Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integrity Algorithms; Document 4: Design Conformance Test Data“. ETSI ETSI TS 135 201 V14.0.0 (2017-04)53GPP TS 35.201 version 14.0.0 Release 14The normative part of the specification of the f8 (confidentiality)

25、and f9 (integrity) algorithms is in the main body of this document. The annexes to this document are purely informative. Annex 1 contains illustrations of functional elements of the algorithm, while Annex 2 contains an implementation program listing of the cryptographic algorithm specified in the ma

26、in body of this document, written in the programming language C. The normative part of the specification of the block cipher (KASUMI) on which they are based is in the main body of Document 2. The annexes of that document, and Documents 3 and 4 above, are purely informative. ETSI ETSI TS 135 201 V14

27、.0.0 (2017-04)63GPP TS 35.201 version 14.0.0 Release 140 Scope This specification gives a detailed specification of the 3GPP confidentiality algorithm f8, and the 3GPP integrity algorithm f9. ETSI ETSI TS 135 201 V14.0.0 (2017-04)73GPP TS 35.201 version 14.0.0 Release 14NORMATIVE SECTION This part o

28、f the document contains the normative specification of the Confidentiality and Integrity algorithms. ETSI ETSI TS 135 201 V14.0.0 (2017-04)83GPP TS 35.201 version 14.0.0 Release 141 Outline of the normative part Section 1 introduces the algorithms and describes the notation used in the subsequent se

29、ctions. Section 3 specifies the confidentiality algorithm f8. Section 4 specifies the integrity algorithm f9. 1.1 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. - References are either specific (identified b

30、y 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 a reference to a 3GPP document (including a GSM document), a non-specific reference

31、implicitly refers to the latest version of that document in the same Release as the present document. 1 3GPP TS 33.102 version 3.2.0: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Security Architecture“. 2 3GPP TS 33.105 version 3.1.0: “

32、3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Cryptographic Algorithm Requirements“. 3 3GPP TS 35.201: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP

33、Confidentiality and Integrity Algorithms; Document 1: f8 and f9 Specification“. 4 3GPP TS 35.202: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integrity Algorithms; Document 2: KASUMI Specif

34、ication“. 5 3GPP TS 35.203: “3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integrity Algorithms; Document 3: Implementors Test Data“. 6 3GPP TS 35.204: “3rd Generation Partnership Project; Tec

35、hnical Specification Group Services and System Aspects; 3G Security; Specification of the 3GPP Confidentiality and Integrity Algorithms; Document 4: Design Conformance Test Data“. 7 ISO/IEC 9797-1:1999: “Information technology Security techniques Message Authentication Codes (MACs)“. ETSI ETSI TS 13

36、5 201 V14.0.0 (2017-04)93GPP TS 35.201 version 14.0.0 Release 142 Introductory information 2.1 Introduction Within the security architecture of the 3GPP system there are two standardised algorithms: A confidentiality algorithm f8, and an integrity algorithm f9. These algorithms are fully specified h

37、ere. Each of these algorithms is based on the KASUMI algorithm that is specified in a companion document4. KASUMI is a block cipher that produces a 64-bit output from a 64-bit input under the control of a 128-bit key. The confidentiality algorithm f8 is a stream cipher that is used to encrypt/decryp

38、t blocks of data under a confidentiality key CK. The block of data may be between 1 and 20000 bits long. The algorithm uses KASUMI in a form of output-feedback mode as a keystream generator. The integrity algorithm f9 computes a 32-bit MAC (Message Authentication Code) of a given input message using

39、 an integrity key IK. The approach adopted uses KASUMI in a form of CBC-MAC mode. 2.2 Notation 2.2.1 Radix We use the prefix 0x to indicate hexadecimal numbers. 2.2.2 Conventions We use the assignment operator =, as used in several programming languages. When we write = we mean that assumes the valu

40、e that had before the assignment took place. For instance, x = x + y + 3 means (new value of x) becomes (old value of x) + (old value of y) + 3. 2.2.3 Bit/Byte ordering All data variables in this specification are presented with the most significant bit (or byte) on the left hand side and the least

41、significant bit (or byte) on the right hand side. Where a variable 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 in

42、to 64-bit substrings MB0,MB1MBi so if we have a message: 0x0123456789ABCDEFFEDCBA987654321086545381AB594FC28786404C50A37 we have: MB0 = 0x0123456789ABCDEF MB1 = 0xFEDCBA9876543210 MB2 = 0x86545381AB594FC2 MB3 = 0x8786404C50A37 ETSI ETSI TS 135 201 V14.0.0 (2017-04)103GPP TS 35.201 version 14.0.0 Rel

43、ease 14In binary this would be: 000000010010001101000101011001111000100110101011110011011110111111111110 with MB0 = 0000000100100011010001010110011110001001101010111100110111101111 MB1 = 1111111011011100101110101001100001110110010101000011001000010000 MB2 = 100001100101010001010011100000011010101101

44、0110010100111111000010 MB3 = 1000011110000110010000000100110001010000101000110111 2.2.4 List of Symbols = The assignment operator. The bitwise exclusive-OR operation. | The concatenation of the two operands. KASUMIxkThe output of the KASUMI algorithm applied to input value x using the key k. Xi The

45、ithbit of the variable X. (X = X0 | X1 | X2 | ). YiThe ithblock of the variable Y. (Y = Y0 | Y1 | Y2 | . ). 2.3 List of Variables A, B are 64-bit registers that are used within the f8 and f9 functions to hold intermediate values. BEARER a 5-bit input to the f8 function. BLKCNT a 64-bit counter used

46、in the f8 function. BLOCKS an integer variable indicating the number of successive applications of KASUMI that need to be performed, for both the f8 and f9 functions. CK a 128-bit confidentiality key. COUNT a 32-bit time variant input to both the f8 and f9 functions. DIRECTION a 1-bit input to both

47、the f8 and f9 functions indicating the direction of transmission (uplink or downlink). FRESH a 32-bit random input to the f9 function. IBS the input bit stream to the f8 function. IK a 128-bit integrity key. KM a 128-bit constant that is used to modify a key. This is used in both the f8 and f9 funct

48、ions. (It takes a different value in each function). KSi is the ithbit of keystream produced by the keystream generator. KSBiis the ithblock of keystream produced by the keystream generator. Each block of keystream comprises 64 bits. LENGTH is an input to the f8 and f9 functions. It specifies the nu

49、mber of bits in the input bitstream. MAC-I is the 32-bit message authentication code (MAC) produced by the integrity function f9. MESSAGE is the input bitstream of LENGTH bits that is to be processed by the f9 function. OBS the output bit streams from the f8 function. PS is the input padded string processed by the f9 function. REGISTER is a 64-bit value that is used within the f8 function. ETSI ETSI TS 135 201 V14.0.0 (2017-04)113GPP TS 35.201 version 14.0.0 Release 143 Confidentiality algorithm f8 3.1 Introduction The conf