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Books > Computing & IT > Applications of computing > Databases > Data security & data encryption
Ausgehend von der Theorie und den Protokollen der
Quantenkryptografie werden in dem Band die Servicequalitaten
vorgestellt, die angesichts der aktuellen technischen
Moeglichkeiten erreichbar sind. Unter Berucksichtigung wenig
beachteter Gesichtspunkte der Kryptoanalyse diskutiert der Autor
die erreichbare Sicherheit und untersucht die Moeglichkeiten des
Quantencomputing. Anhand praxisnaher Aufgaben koennen Leser ihr
Wissen vertiefen und lernen, die Techniken kritisch zu bewerten.
Mit Programmieranleitung fur Simulationsversuche auf dem eigenen
Rechner.
Thorough, systematic introduction to serious cryptography, especially strong in modern forms of cipher solution used by experts. Nihilist, grille, U. S. Army, key-phrase, multiple-alphabet, Gronsfeld, Porta, Beaufort, periodic ciphers and more. Simple and advanced methods. 166 specimens to solve-with solutions.
In recent years, a considerable amount of effort has been devoted,
both in industry and academia, towards the design, performance
analysis and evaluation of modulation schemes to be used in
wireless and optical networks, towards the development of the next
and future generations of mobile cellular communication systems.
Modulation Theory is intended to serve as a complementary textbook
for courses dealing with Modulation Theory or Communication
Systems, but also as a professional book, for engineers who need to
update their knowledge in the communications area. The modulation
aspects presented in the book use modern concepts of stochastic
processes, such as autocorrelation and power spectrum density,
which are novel for undergraduate texts or professional books, and
provides a general approach for the theory, with real life results,
applied to professional design. This text is suitable for the
undergraduate as well as the initial graduate levels of Electrical
Engineering courses, and is useful for the professional who wants
to review or get acquainted with the a modern exposition of the
modulation theory. The book covers signal representations for most
known waveforms, Fourier analysis, and presents an introduction to
Fourier transform and signal spectrum, including the concepts of
convolution, autocorrelation and power spectral density, for
deterministic signals. It introduces the concepts of probability,
random variables and stochastic processes, including
autocorrelation, cross-correlation, power spectral and
cross-spectral densities, for random signals, and their
applications to the analysis of linear systems. This chapter also
includes the response of specific non-linear systems, such as power
amplifiers. The book presents amplitude modulation with random
signals, including analog and digital signals, and discusses
performance evaluation methods, presents quadrature amplitude
modulation using random signals. Several modulation schemes are
discussed, including SSB, QAM, ISB, C-QUAM, QPSK and MSK. Their
autocorrelation and power spectrum densities are computed. A
thorough discussion on angle modulation with random modulating
signals, along with frequency and phase modulation, and orthogonal
frequency division multiplexing is provided. Their power spectrum
densities are computed using the Wiener-Khintchin theorem.
Quantum cryptography (or quantum key distribution) is a
state-of-the-art technique that exploits properties of quantum
mechanics to guarantee the secure exchange of secret keys. This
self-contained text introduces the principles and techniques of
quantum cryptography, setting it in the wider context of
cryptography and security, with specific focus on secret-key
distillation. The book starts with an overview chapter, progressing
to classical cryptography, information theory (classical and
quantum), and applications of quantum cryptography. The discussion
moves to secret-key distillation, privacy amplification and
reconciliation techniques, concluding with the security principles
of quantum cryptography. The author explains the physical
implementation and security of these systems, enabling engineers to
gauge the suitability of quantum cryptography for securing
transmission in their particular application. With its blend of
fundamental theory, implementation techniques, and details of
recent protocols, this book will be of interest to graduate
students, researchers, and practitioners in electrical engineering,
physics, and computer science.
Personal data security breaches are being reported with increasing
regularity. Within the past few years, numerous examples of data
such as Social Security, bank account, credit card, and driver's
license numbers, as well as medical and student records have been
compromised. A major reason for the increased awareness of these
security breaches is a California law that requires notice of
security breaches to the affected individuals. This law,
implemented in July 2003, was the first of its kind in the nation.
State data security breach notification laws require companies and
other entities that have lost data to notify affected consumers. As
of January 2007, 35 states have enacted legislation requiring
companies or state agencies to disclose security breaches involving
personal information. Congress is considering legislation to
address personal data security breaches, following a series of
high-profile data security breaches at major financial services
firms, data brokers (including ChoicePoint and LexisNexis), and
universities. In the past three years, multiple measures have been
introduced, but to date, none have been enacted.
Implement bulletproof Cisco security the battle-tested "Hacking
Exposed" way. .
Defend against the sneakiest attacks by looking at your Cisco
network and devices through the eyes of the intruder. "Hacking
Exposed Cisco Networks" shows you, step-by-step, how hackers target
exposed systems, gain access, and pilfer compromised networks. All
device-specific and network-centered security issues are covered
alongside real-world examples, in-depth case studies, and detailed
countermeasures. Its all here--from switch, router, firewall,
wireless, and VPN vulnerabilities to Layer 2 man-in-the-middle,
VLAN jumping, BGP, DoS, and DDoS attacks. Youll prevent tomorrows
catastrophe by learning how new flaws in Cisco-centered networks
are discovered and abused by cyber-criminals. Plus, youll get
undocumented Cisco commands, security evaluation templates, and
vital security tools from hackingexposedcisco.com.. . . Use the
tried-and-true "Hacking Exposed" methodology to find, exploit, and
plug security holes in Cisco devices and networks. Locate
vulnerable Cisco networks using Google and BGP queries, wardialing,
fuzzing, host fingerprinting, and portscanning. Abuse Cisco
failover protocols, punch holes in firewalls, and break into VPN
tunnels . Use blackbox testing to uncover data input validation
errors, hidden backdoors, HTTP, and SNMP vulnerabilities. Gain
network access using password and SNMP community guessing, Telnet
session hijacking, and searching for open TFTP servers. Find out
how IOS exploits are written and if a Cisco router can be used as
an attack platform. Block determined DoS and DDoS attacks using
Cisco proprietary safeguards, CAR, and NBAR. Prevent secret keys
cracking, sneakydata link attacks, routing protocol exploits, and
malicious physical access. . . .
From the exclusive publishers of Oracle Press Books, here is the only book available offering complete coverage of RMAN (Recovery Manager), Oracle’s free backup and recovery technology. An indispensable resource for new Oracle users, database administrators, and system administrators.
Mission critical real-time systems often function in environments
that cannot be modelled with static approaches. Because of their
(externally-driven) wide dynamic range of system operation, the
number of data elements to be processed in an arbitrary period is
unknown at the time of system engineering (other than an extremely
pessimistic worst case sense). While it may be possible to
determine a theoretical upper bound on the number of data items,
the construction and maintenance of system components to handle
worst-case conditions can be prohibitively costly. To accommodate
such dynamic mission critical real-time systems, it is useful to
design computing systems that allow reconfiguration and
reallocation of resources by sharing a pool of distributed
computational resources. Unfortunately, the problem of continuously
providing critical system functions in such dynamic real-time
environments is exacerbated when one considers attack
vulnerability. The Internet has made mission critical real-time
computer systems subject to an ever-changing array of attacks for
which current defence mechanisms are insufficient. In order to
combat intruders in this new environment, new techniques must be
developed that enable decision makers to detect unusual behaviour
in their systems, correlate anomalies into higher-level attacker
goals, plan appropriate response actions, and execute their plans.
This special book presents current work in this general area of
real-time system security.
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