COMPLETE & UPDATED SOLUTION MANUAL FOR CRYPTOGRAPHY & NETWORK SECURITY

COMPLETE & UPDATED

SOLUTION MANUAL

FOR

CRYPTOGRAPHY

&

NETWORK SECURITY

© 2026 COPY RIGHT RESERVED
-1- @ Ebooks King.

, TABLE OF CONTENTS




Chapter t’1: Introduction .............................................................................................. 5
Chapter t’2: Classical t’Encryption t’Techniques ............................................................ 7
Chapter t’3: Block t’Ciphers t’and t’the t’Date t’Encryption t’Standard ............................ 13
Chapter t’4: Finite t’Fields............................................................................................. 21
Chapter t’5: Advanced t’Encryption t’Standard ........................................................... 28
Chapter t’6: More t’on t’Symmetric t’Ciphers................................................................. 33
Chapter t’7: Confidentiality t’Using t’Symmetric t’Encryption ..................................... 38
Chapter t’8: Introduction t’to t’Number t’Theory .......................................................... 42
Chapter t’9: Public-Key t’Cryptography t’and t’RSA ..................................................... 46
Chapter t’10: Key t’Management; t’Other t’Public-Key t’Cryptosystems......................... 55
Chapter t’11: Message t’Authentication t’and t’Hash t’Functions .................................... 59
Chapter t’12: Hash t’and t’MAC t’Algorithms ................................................................. 62
Chapter t’13: Digital t’Signatures t’and t’Authentication t’Protocols................................ 66
Chapter t’14: Authentication t’Applications ................................................................. 71
Chapter t’15: Electronic t’Mail t’Security......................................................................... 73
Chapter t’16: IP t’Security ............................................................................................... 76
Chapter t’17: Web t’Security........................................................................................... 80
Chapter t’18: Intruders .................................................................................................. 83
Chapter t’19: Malicious t’Software ................................................................................. 87
Chapter t’20: Firewalls .................................................................................................. 89




-2-

, CHAPTER 1
INTRODUCTION

ANSWERS TO QUESTIONS T’ T’




1.1 The t’OSI t’Security t’Architecture t’is t’a t’framework t’that t’provides t’a t’systematic t’wayt’of
t’defining t’the t’requirements t’ for t’security t’and t’characterizing t’the t’approaches t’to t’satisfying

t’those t’requirements. t’The t’document t’defines t’security t’attacks, t’mechanisms, t’and t’services,

t’and t’the t’relationships t’among t’these t’categories.




1.2 Passive t’attacks t’have t’to t’do t’with t’eavesdropping t’on, t’or t’monitoring,
t’transmissions. t’Electronic t’mail, t’file t’transfers, t’and t’client/server t’exchanges t’are

t’examples t’of t’transmissions t’that t’can t’be t’monitored. t’Active t’attacks t’include t’the

t’modification t’of t’transmitted t’data t’and t’attempts t’to t’gain t’unauthorized t’access t’to


t’computer t’systems.




1.3 Passive t’attacks: t’release t’of t’message t’contents t’and t’traffic t’analysis. t’Active t’attacks:
masquerade, t’replay, t’modification t’of t’messages, t’and t’denial t’of t’service.

1.4 Authentication: t’The t’assurance t’that t’the t’communicating t’entityt’is t’the t’one t’that t’it t’claims t’to
t’be. t’Access t’control: t’The t’prevention t’of t’unauthorized t’use t’of t’a t’resource t’(i.e., t’this t’service

t’controls t’who t’can t’have t’access t’to t’a t’resource, t’under t’what t’conditions t’access t’can t’occur, t’and

t’what t’those t’accessing t’the t’resource t’are t’allowed t’to t’do).

Data t’confidentiality: t’The t’protection t’of t’data t’from t’unauthorized t’disclosure.
Data t’integrity: t’The t’assurance t’that t’data t’received t’are t’exactly t’as t’sent t’by t’an t’authorized
t’entity t’(i.e., t’contain t’no t’ modification, t’ insertion, t’deletion, t’or t’replay).

Nonrepudiation: t’Provides t’protection t’against t’denial t’by t’one t’of t’the t’entities t’involved t’in t’a
t’communication t’of t’ having t’participated t’ in t’all t’or t’part t’of t’the t’communication.

Availability t’service: t’The t’property t’of t’a t’system t’or t’a t’system t’resource t’being t’accessible
t’and t’usable t’upon t’demand t’ by t’an t’authorized t’system t’entity, t’according t’to t’performance

t’specifications t’for t’the t’system t’(i.e., t’a t’system t’is t’available t’if t’it t’provides t’services t’according

t’to t’the t’system t’design t’whenever t’users t’request t’them).




1.5 See t’Table t’1.3.




-3-

, ANSWERS TO PROBLEMS T’ T’




1.1 Release Traffic Masquerade Replay Modification Denial
t’of t’analysis t’of t’messages t’of

t’messag t’servic

e e
t’content

s
Peer t’entity Y
t’authentication


Data t’origin Y
t’authentication



Access t’control Y
Confidentiality Y
Traffic t’flow Y
t’confidentiality



Data t’integrity Y Y
Non-repudiation Y
Availability Y


1.2 Release Traffic Masquerade Replay Modification Denial
t’of t’analysis t’of t’messages t’of

t’messag t’servic

e e
t’content

s
Encipherment Y
Digital t’signature Y Y Y
Access t’control Y Y Y Y Y
Data t’integrity Y Y
Authentication Y Y Y Y
t’exchange



Traffic t’padding Y
Routing t’control Y Y Y
Notarization Y Y Y


-4-