В этой книге систематически и компактно изложен «джентльменский набор» современных криптографических приемов: основы симметричного шифрования (включая блочные и потоковые шифры), асимметричного шифрования, цифровых подписей, управления ключами и имитозащиты информации. Приложение посвящено нематематическим - эргономическим и психологическим - аспектам применения крипто и защиты информации.

Розглянуто множини та відношення, натуральні числа та елементи комбінаторики, бульові алгебри, графи, автомати й алгоритми; деякі методи кодування та шифрування. Підібрано вправи до кожної теми. Для студентів молодших курсів університетів.

Книга представляет собой сборник статей выдающегося математика и инженера, члена Национальной академии наук США, Клода Эльвуда Шеннона. Многие из включенных в сборник работ, опубликованных проф. Шенноном в различных журналах в 1938-1962 годах, положили начало новым областям исследований в области общей теории связи, теории автоматов, электротехники, теории информации и лингвистики, таким, как теория анализа и синтеза релейных устройств, теория вероятностных схем, теория передачи информации и т.д. Статьи расположены в сборнике по тематическому принципу: в первой части помещены работы по теории управляющих систем, во второй - по теории информации, в третьей - все остальные. В конце книги приводится библиография работ по теории информации. Книга представляет интерес для широкого круга математиков и специалистов, работающих в области автоматического управления, теории связи, радиотехники, теории надежности и в смежных областях, так иили инае связанных с использованием результатов теории информации. Она будет полезна также студентам страших курсов университетов и технических вузов инженерам и научным работникам различных специальностей, занимающимся вопросами, связанными с математическими аспектами кибернетики.

Kpуг читателей очень широк: от школьников, интересующихся теорией чисел или шифрованием, до банковских и корпоративных программистов, желающих глубже вникнуть в основы своей деятельности.

With this text, readers master common security principles and techniques, such as how to do private key encryption, implement a login screen, configure Microsoft .NET policy tools, and perform a security audit.

A behind-the-scenes examination of binary cryptography, from the simple "modulo" and shift operations to complex algorithms like RSA.

The expanded, updated version of this popular operations guide is packed full of practical information to help IT professionals plan the installation, deployment, and maintenance of Windows 2000 Server. In addition to updated material on core topics such as security, disaster planning and recovery, and interoperability with NetWare, UNIX, and Linux, it also includes new sections about Microsoft Internet Security and Acceleration Server, scripting, all the features released in Service Pack 3, 128-bit encryption, and other vital topics. Appendices provide quick guides to interface changes and optional components in Windows 2000 Server.

This book gives a general picture of modern cryptography and covers specific issues related to developing fast block ciphers using software and/or hardware implementation in a way that is easily understandable to a wide circle of readers.

There are two kinds of cryptography in this world: cryptography that will stop your kid sister from reading your files, and cryptography that will stop major governments from reading your files. This book is about the latter. If I take a letter, lock it in a safe, hide the safe somewhere in New York, then tell you to read the letter, that’s not security. That’s obscurity. On the other hand, if I take a letter and lock it in a safe, and then give you the safe along with the design specifications of the safe and a hundred identical safes with their combinations so that you and the world’s best safecrackers can study the locking mechanism—and you still can’t open the safe and read the letter—that’s security. For many years, this sort of cryptography was the exclusive domain of the military. The United States’ National Security Agency (NSA), and its counterparts in the former Soviet Union, England, France, Israel, and elsewhere, have spent billions of dollars in the very serious game of securing their own communications while trying to break everyone else’s. Private individuals, with far less expertise and budget, have been powerless to protect their own privacy against these governments. During the last 20 years, public academic research in cryptography has exploded. While classical cryptography has been long used by ordinary citizens, computer cryptography was the exclusive domain of the world’s militaries since World War II. Today, state–of–the–art computer cryptography is practiced outside the secured walls of the military agencies. The layperson can now employ security practices that can protect against the most powerful of adversaries—security that may protect against military agencies for years to come. Do average people really need this kind of security? Yes. They may be planning a political campaign, discussing taxes, or having an illicit affair. They may be designing a new product, discussing a marketing strategy, or planning a hostile business takeover. Or they may be living in a country that does not respect the rights of privacy of its citizens. They may be doing something that they feel shouldn’t be illegal, but is. For whatever reason, the data and communications are personal, private, and no one else’s business. This book is being published in a tumultuous time. In 1994, the Clinton administration approved the Escrowed Encryption Standard (including the Clipper chip and Fortezza card) and signed the Digital Telephony bill into law. Both of these initiatives try to ensure the government’s ability to conduct electronic surveillance. Some dangerously Orwellian assumptions are at work here: that the government has the right to listen to private communications, and that there is something wrong with a private citizen trying to keep a secret from the government. Law enforcement has always been able to conduct court–authorized surveillance if possible, but this is the first time that the people have been forced to take active measures to make themselves available for surveillance. These initiatives are not simply government proposals in some obscure area; they are preemptive and unilateral attempts to usurp powers that previously belonged to the people. Clipper and Digital Telephony do not protect privacy; they force individuals to unconditionally trust that the government will respect their privacy. The same law enforcement authorities who illegally tapped Martin Luther King Jr.’s phones can easily tap a phone protected with Clipper. In the recent past, local police authorities have either been charged criminally or sued civilly in numerous jurisdictions—Maryland, Connecticut, Vermont, Georgia, Missouri, and Nevada—for conducting illegal wiretaps. It’s a poor idea to deploy a technology that could some day facilitate a police state. The lesson here is that it is insufficient to protect ourselves with laws; we need to protect ourselves with mathematics. Encryption is too important to be left solely to governments. This book gives you the tools you need to protect your own privacy; cryptography products may be declared illegal, but the information will never be.

Написано ведущими специалистами в области криптографии, имеющими многолетний опыт разработки криптографических средств защиты и преподавания дисциплин криптографического цикла в ведущих вузах страны. Излагаются основные понятия и разделы, позволяющие получить представление о задачах и проблемах современной криптографии. В пособие вошли как традиционные вопросы классификации и оценки надежности шифров, так и системные вопросы использования криптографических методов защиты информации. Для студентов, аспирантов, изучающих дисциплины по криптографии и компьютерной безопасности, преподавателей, а также широкого круга специалистов, чьей задачей являются квалифицированный выбор и организация использования криптографических средств защиты информации.