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详细说明： AES 标准的英文版 目录如下： Table of Contents 1. INTRODUCTION............................................................................................................................................. 5 2. DEFINITIONS .................................................................................................................................................. 5 2.1 GLOSSARY OF TERMS AND ACRONYMS .................................................................. ......................................... 5 2.2 ALGORITHM PARAMETERS, SYMBOLS, AND FUNCTIONS ................................................................................. 6 3. NOTATION AND CONVENTIONS............................................................................................................... 7 3.1 INPUTS AND OUTPUTS ..................................................................................................................................... 7 3.2 BYTES ............................................................................................................................................................. 8 3.3 ARRAYS OF BYTES .......................................................................................................................................... 8 3.4 THE STATE ...................................................................................................................................................... 9 3.5 THE STATE AS AN ARRAY OF COLUMNS ........................................................................................................ 10 4. MATHEMATICAL PRELIMINARIES ....................................................................................................... 10 4.1 ADDITION ...................................................................................................................................................... 10 4.2 MULTIPLICATION .......................................................................................................................................... 10 4.2.1 Multiplication by x .............................................................................................................................. 11 POLYNOMIALS WITH COEFFICIENTS IN GF(28) .............................................................................................. 12 4.3 5. ALGORITHM SPECIFICATION................................................................................................................. 13 5.1 CIPHER .......................................................................................................................................................... 14 5.1.1 SubBytes()Transformation............................................................................................................ 15 5.1.2 ShiftRows() Transformation ........................................................................................................ 17 5.1.3 MixColumns() Transformation...................................................................................................... 17 5.1.4 AddRoundKey() Transformation .................................................................................................. 18 5.2 KEY EXPANSION ........................................................................................................................................... 19 5.3 INVERSE CIPHER............................................................................................................................................ 20 5.3.1 InvShiftRows() Transformation ................................................................................................. 21 5.3.2 InvSubBytes() Transformation ................................................................................................... 22 5.3.3 InvMixColumns() Transformation............................................................................................... 23 5.3.4 Inverse of the AddRoundKey() Transformation............................................................................. 23 5.3.5 Equivalent Inverse Cipher .................................................................................................................. 23 6. IMPLEMENTATION ISSUES ...................................................................................................................... 25 6.1 KEY LENGTH REQUIREMENTS ....................................................................................................................... 25 6.2 KEYING RESTRICTIONS ................................................................................................................................. 26 6.3 PARAMETERIZATION OF KEY LENGTH, BLOCK SIZE, AND ROUND NUMBER ................................................. 26 6.4 IMPLEMENTATION SUGGESTIONS REGARDING VARIOUS PLATFORMS ........................................................... 26 APPENDIX A - KEY EXPANSION EXAMPLES ................................................................................................ 27 A.1 EXPANSION OF A 128-BIT CIPHER KEY .......................................................................................................... 27 A.2 EXPANSION OF A 192-BIT CIPHER KEY .......................................................................................................... 28 A.3 EXPANSION OF A 256-BIT CIPHER KEY .......................................................................................................... 30 APPENDIX B – CIPHER EXAMPLE.................................................................................................................... 33 APPENDIX C – EXAMPLE VECTORS................................................................................................................ 35 C.1 AES-128 (NK=4, NR=10).............................................................................................................................. 35 C.2 AES-192 (NK=6, NR=12).............................................................................................................................. 38 C.3 AES-256 (NK=8, NR=14).............................................................................................................................. 42 APPENDIX D - REFERENCES.............................................................................................................................. 47 ...展开收缩
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