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.