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An Introduction to Cryptography
На английском.

Table of Contents:
Preface
Who should read this guide 
How to use this guide  
For more information  
Customer service 
Technical support
Related reading 
Chapter 1. The Basics of Cryptography  
Encryption and decryption 
What is cryptography?  
Strong cryptography 
How does cryptography work?
Conventional cryptography 
Caesar’s Cipher  
Key management and conventional encryption 
Public key cryptography 
How PGP works 
Keys  
Digital signatures 
Hash functions
Digital certificates 
Validity and trust 
Checking validity 
Establishing trust 
Meta and trusted introducers  
Trust models
Direct Trust 
Hierarchical Trust
Web of Trust 
Levels of trust in PGP  
Table of Contents
What is a passphrase? 
Key splitting  
Technical details 
Chapter 2. Phil Zimmermann on PGP  
Why I wrote PGP
The PGP symmetric algorithms  
About PGP data compression routines
About the random numbers used as session keys
About the message digest  
How to protect public keys from tampering
How does PGP keep track of which keys are valid?  
How to protect private keys from disclosure  
What if you lose your private key? 
Beware of snake oil
Vulnerabilities   
Compromised passphrase and private key  
Public key tampering  
Not Quite Deleted Files 
Viruses and Trojan horses  
Swap files or virtual memory
Physical security breach 
Tempest attacks  
Protecting against bogus timestamps
Exposure on multi-user systems
Traffic analysis  
Cryptanalysis
Glossary

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