Modern Cryptography - Theory and Practice

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Cryptology consists of several mechanisms which ensure confidentiality and authenticity of the data. The fundamental objective of cryptology is the secure communication between sender and receiver through insecure channel. Modern cryptosystems can be broadly categorized in to secret key (symmetric) and public key (asymmetric) cryptosystems based up on the key which is used for data transmission. This paper focuses on the discussion of different categories of public key cryptosystems with its merits and demerits.

Viele haben auf die eine oder andere Weise dazu beigetragen, dass diese Dissertation so entstehen konnte, wie sie nun vorliegt. Der Versuch einer vollständigen Aufzählung müsste scheitern; hier seien zunächst die erwähnt, die nicht mit Namen genannt werden können, weil sie als anonyme Gutachter für Konferenzen tätig waren und dabei Anregungen zur Darstellung einiger der hier präsentierten Ergebnisse beigetragen haben. Außerdem zu nennen ist David Hopwood, der in einer früheren Fassung der Ausführungen zur beweisbaren Sicherheit des Mix-Verfahrens (hier in Abschnitt 4.2) eine Lücke aufgespürt hat. Prof. Johannes Buchmann hat es auf bemerkenswerte Weise verstanden, die Arbeitsbedingungen zu schaffen, in denen diese Dissertation gedeihen konnte, und hat wertvolle Anregungen geliefert. Auch alle anderen am Fachgebiet Theoretische Informatik hatten teil daran, eine angenehme und fruchtbare Arbeitsatmosphäre zu schaffen. Danke!

Journal of Logic and Computation, 2002

Two sorts of contemporary improvements in cryptography are analysed. Extending the use of teleprocessing has created a need for new types of cryptographic systems that reduce the need for safe key circulation networks and have anything akin to a written label. This paper suggests strategies for addressing these already unresolved questions. It also discusses how communications and computation hypotheses are beginning to provide tools for addressing long-standing cryptographic concerns.

From September 25th till September 30th, 2011, the Dagstuhl Seminar 11391 about "Public-Key Cryptography" took place at Schloss Dagstuhl. The meeting hosted 33 international researchers and incited active discussions about recent developments in this area. Seminar 25.-30. September, 2011 -www.dagstuhl.de/11391 1998 ACM Subject Classification D.4.6 Security and Protection

Network Security, 2007

As the term itself manifests, the original purpose of cryptography is message confi dentiality. 1 Modern cryptography, however, spans a wider range of topics. Formally speaking, "cryptography is the study of mathematical techniques related to aspects of information security such as confi dentiality, data integrity, authentication and non-repudiation" [1]. This defi nition requires the defi nition of the basic security aspects of information security.

De Gruyter eBooks, 2020

Branches of Cryptology 1.1.1.1 Introduction Cryptography is essential to providing security. In this chapter, the basic cryptographic concepts and terminologies are introduced. These concepts and terminologies will be used in different contexts in the following chapters. 1.1.1.2 Cryptology Although cryptography is the main point of discussion in this chapter, there is a more generic umbrella term, called cryptology, which can be further split into cryptography and cryptanalysis. 1.1.4.1 Key Pair for Asymmetric Cryptography Key pair is a pair of related keys, called private and public keys, for asymmetric cryptography. The private key defines the private transformation and the public key defines the public transformation [4]. 1.1.4.2 Private Key Private key is the key of an entity's asymmetric key pair which should only be known to and used by that entity [5]. A private key is solely reserved for that entity and should not be made public, hence the name. 1.1.4.3 Public Key Public key of an entity's asymmetric key pair can be made public [5]. However, as the key is intended to be made public, it must fulfill certain conditions listed below:

2012

The purpose of this book is to present some of the critical security challenges in today's computing world and to discuss mechanisms for defending against those attacks by using classical and modern approaches of cryptography and other defence mechanisms. It contains eleven chapters which are divided into two parts. The chapters in Part 1 of the book mostly deal with theoretical and fundamental aspects of cryptography. The chapters in Part 2, on the other hand, discuss various applications of cryptographic protocols and techniques in designing computing and network security solutions. The book is expected to be useful for researchers, engineers, graduate and doctoral students working in cryptography and security related areas.