Contents Preface vi i Chapter 1 . Introductio n 1 Chapter 2 . Caesa r Ciphe r 3 Chapter 3 . Terminolog y an d Result s fro m Numbe r Theor y 9 Chapter 4 . Modula r Arithmeti c 1 7 Chapter 5 . Describin g th e Caesa r Ciphe r Mathematicall y 2 7 Chapter 6 . Cryptanalysi s fo r th e Caesa r Ciphe r 3 1 Chapter 7 . Multiplicatio n Ciphe r 3 7 Chapter 8 . Cryptanalysi s fo r th e Multiplicatio n Ciphe r 4 7 Chapter 9 . Multiplication-Shif t Ciphe r 5 1 Chapter 10 . Cryptanalysi s fo r th e Multiplication-Shif t Ciphe r 5 9 Chapter 11 . Non-Mathematica l Substitutio n Cipher s 6 9 Chapter 12 . Preparin g t o Generaliz e 7 5 Chapter 13 . Findin g Inverse s Modul o n 8 1 Chapter 14 . Genera l Multiplication-Shif t Ciphe r 8 9 Chapter 15 . Securit y o f the Genera l Multiplication-Shif t Ciphe r 9 3 Chapter 16 . Introductio n t o th e Exponentia l Ciphe r 10 3 Chapter 17 . Decipherin g th e Exponentia l Ciphe r 11 1 Chapter 18 . Cryptanalysi s fo r th e Exponentia l Ciphe r 11 9 Chapter 19 . Mathematica l Basi s fo r th e Exponentia l Ciphe r 12 3 Chapter 20 . Publi c Ke y Cipher s 12 7 Chapter 21 . RS A Ciphe r 13 1
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