Detail of GM/T 0001.3-2012

Introduction of GM/T 0001.3-2012

1 Scope This part of GM/T 0001 describes the integrity algorithm based on the ZUC stream cipher algorithm. It is applicable to the development, testing, and use of products related to the integrity algorithm based on the ZUC stream cipher algorithm. 2 Normative References The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document. GM/T 0001.1 ZUC Stream Cipher Algorithm Part 1: Algorithm Description 3 Terms and Definitions The terms and definitions defined in GM/T 0001.1 apply to this document. 4 Symbols and Abbreviations 4.1 Symbols The following symbols apply to this document: Bitwise XOR operation || String or byte string concatenation 「x7 Smallest integer no less than x ≪ k Left shift by k bits 4.2 Abbreviations The following abbreviations apply to this document: IK: Integrity Key IV: Initial Vector LTE: Long Term Evolution MAC: Message Authentication Code 5 Algorithm Description 5.1 Algorithm Inputs and Outputs The input parameters of this algorithm are shown in Table 1, and the output parameter is shown in Table 2. Table 1 The inputs Parameter Size(bits) Remark IK 128 Integrity key IV 128 Initialization Vector LENGTH 32 Bit length of the input message stream M LENGTH Input message stream with length LENGTH Table 2 The output Parameter Size(bits) Remark MAC 32 The MAC 5.2 Algorithm Workflow 5.2.1 Key Stream Generation Let L =「LENGTH/327 + 2. Using the integrity key (IK) and the initial vector (IV), and L as input parameters and generate a key stream according to the method described in section 5.6 of GM/T 0001.1. Represent the generated key stream as a bit string k[0],k[1], …,k[32× L−1], where k[0] is the highest bit of the first key word and k[31] is the lowest bit of the first key word, continuing in this manner. For i=0,1,2, …,32×(L−1), let ki=k[i] || k[i+1] || … || k[i+31], where ki is a 32-bit word. For 3GPP LTE application scenarios, refer to Appendix A for the initialization method of the initial vector (IV). 5.2.2 MAC Calculation Let Tbe a 32-bit variable. Initialize T=0. For i=0,1, …,LENGTH−1, If M[i]=1, then 。。。 For 3GPP LTE application scenarios, refer to Appendix B for algorithm calculation examples. Appendix A (Informative Appendix) Parameter Initialization in 3GPP LTE

Contents of GM/T 0001.3-2012