Implementing-cryptography-using-python

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Contents
Using Conditionals 16
Using Loops 17
for17
while18
continue18
break18
else18
Using Files 19
Understanding Python Semantics 20
Sequence Types 20
Introducing Custom Functions 26
Downloading Files Using Python 27
Introducing Python Modules 28
Creating a Reverse Cipher 29
Summary30
Chapter 2 Cryptographic Protocols and Perfect Secrecy 31
The Study of Cryptology 32
Understanding Cryptography 32
Cryptography’s Famous Family: Alice and Bob 33
Diffie-Hellman34
Data Origin Authentication 34
Entity Authentication 35
Symmetric Algorithms 36
Asymmetric Algorithms 36
The Needham-Schroeder Protocols 36
The Otway-Rees Protocol 38
Kerberos39
Multiple-Domain Kerberos 40
X.50941
Formal Validation of Cryptographic Protocols 46
Configuring Your First Cryptographic Library 47
Understanding Cryptanalysis 47
Brute-Force Attacks 47
Side-Channel Attacks 48
Social Engineering 48
Analytical Attacks 48
Frequency Analysis 48
Attack Models 49
Shannon’s Theorem 50
One-Time Pad 51
XOR, AND, and OR 51
One-Time Pad Function 56
One-Way Hashes 58