文档介绍：munications works
munications works series is a range of textbooks,
monographs and handbooks. It sets out to provide students, researchers and
nonspecialists alike with a sure grounding in current knowledge, together with
comprehensible access to the latest developments munications and
networking.
Emphasis is placed on clear and explanatory styles that support a tutorial approach
so that even the plex of topics is presented in a lucid and intelligible
manner.
For other titles published in this series, go to /
Joseph Migga Kizza
A Guide puter
Network Security
1 32
Joseph Migga Kizza, PhD
University of Tennessee-Chattanooga
Department puter Science
615 McCallie Ave.
Chattanooga TN 37403
326 Grote Hall
USA
joseph-******@
Series Editor
Professor . Sammes, BSc, MPhil, PhD, FBCS, CEng
CISM Group, Cranfi eld University,
RMCS, Shrivenham, Swindon SN6 8LA,UK
CCN Series ISSN 1617-7975
ISBN 978-1-84800-916-5 e-ISBN 978-1-84800-917-2
DOI -1-84800-917-2
Library of Congress Control Number: 2008942999
© Springer-Verlag London Limited 2009
All rights reserved. This work may not be translated or copied in whole or in part without the written
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10013, USA), except for brief excerpts in connection with reviews or scholarly analysis. Use in connec-
tion with any form of information storage and retrieval, electronic adaptation, computer software, or by
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The use in this publication of trade names, trademarks, service marks and similar terms, even if they are
not identifi ed as such, is not to be taken as an expression of opinion as to whether or not they are subject
to proprietary rights.
Printed on acid-free paper
To the Trio: Immaculate, Josephine,
and Florence
Preface
If we are to believe in Moore’s law, then every passing day brin