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Chapter 23

Upper OSI

Layers

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Figure 23-1

Session Layer Dialog

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Figure 23-2

Session-to-Transport Layer Communication

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Figure 23-3

Synchronization Points

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Figure 23-4

SPDU

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Figure 23-5

Presentation Layer Functions

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Figure 23-6

Direct and Indirect Methods of Translation

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Figure 23-7

Concept of Encryption and Decryption

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Figure 23-8

Encryption/Decryption Methods

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Figure 23-9

Monoalphabetic Substitution

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Figure 23-10

Polyalphabetic Substitution

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Figure 23-11

Transpositional Encryption

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Figure 23-12

Encoding/Decoding

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Figure 23-13

Permutation

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Figure 23-14

Substitution

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Figure 23-15

Product

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Figure 23-16

Exclusive OR

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Figure 23-17

Rotation

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Figure 23-18

DES

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Figure 23-19

Subkey Generation in DES

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Figure 23-20

One of the 16Steps in DES

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Figure 23-21

Public Key Encryption

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Figure 23-22

RSA

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Figure 23-23

RSA Encryption and Decryption

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Figure 23-24

Security of RSA

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Figure 23-25

Signature Authentication

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Figure 23-26

Data Compression Methods

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Figure 23-27

Run-Length Encoding

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Figure 23-28

MHS

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Figure 23-29

Message Format in MHS

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Figure 23-30

Virtual File Storage

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Figure 23-31

Local Access

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Figure 23-32

Remote Access

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Figure 23-33

Virtual Terminal