Contemporary Cryptography (Artech House Computer Security by Rolf Oppliger

By Rolf Oppliger

A sensible selection for either beginner and skilled pros seeking to increase their wisdom of up to date cryptography, this entire source places all facets of this significant subject into viewpoint. in contrast to different books out there which are both constrained in scope or very theoretical, This distinct source provides a radical creation to the present cutting-edge in sleek cryptography, supplying a pragmatic realizing of crucial instruments and purposes to aid pros with their day-by-day paintings. The e-book additionally comprises whole assurance of the underpinnings and simple ideas of cryptography to aid practitioners and scholars absolutely grasp the fabric.

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Extra resources for Contemporary Cryptography (Artech House Computer Security Series) (1st Edition)

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Some of these systems are still in use today, such as the RSA [27] and ElGamal [28] public key cryptosystems. Other systems, such as a number of public key cryptosystems based on the knapsack problem17 have been broken and are no longer in use today. Some public key cryptosystems are overviewed and discussed in Part IV of this book. Since around the early 1990s, we have seen a wide deployment and massive commercialization of cryptography. Today, many companies develop, market, and sell cryptographic techniques, mechanisms, services, and products (implemented in hardware or software) on a global scale.

Ellis, Clifford Cocks, and Malcolm J. Williamson under the name non-secret encryption (NSE). html) to get the story. Being part of the world of secret services and intelligence agencies, Ellis, Cocks, and Williamson were not allowed to openly talk about their invention. 17 The knapsack problem is a well-known problem in computational complexity theory and applied mathematics. Given a set of items, each with a cost and a value, determine the number of each item to include in a collection so that the total cost is less than some given cost and the total value is as large as possible.

Unconditional security: If the adversary is not able to solve the task even with infinite computing power, then we talk about unconditional or informationtheoretic security. The mathematical theories behind this type of security are probability theory and information theory, as briefly introduced in Chapters 4 and 5. Conditional security: If the adversary is theoretically able to solve the task, but it is computationally infeasible for him or her (meaning that he or she is not able to solve the task given his or her resources, capabilities, and access to a priori or side information), then we talk about conditional or computational security.

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