Modern cryptography systems: a hybrid approach, Other Subject

Modern Cryptography Systems: A Hybrid Approach

In fact, a mixture of both public key and traditional symmetric cryptography is used in current cryptographic systems. The motivation for this is that public key encryption schemes are computationally concentrated versus their symmetric key counterparts. Because symmetric key cryptography is much faster for encrypting bulk data, modern cryptography systems naturally use public key cryptography to resolve the key distribution problem first, and then symmetric key cryptography is used to encrypt the bulk data.

Such a system is used by today's SSL protocol for securing Web transactions and by secure e-mail schemes such as Secure/Multipurpose Internet Mail Extensions (S/MIME) that are built into such products as Netscape Communicator and Microsoft Internet Explorer.

The Key Management Problem

Basic every cryptographic system is a set of realistic harms and questions concerning security, privacy, and in general self-belief in the underlying privacy features of the system. In principle, the techniques of asymmetric and symmetric cryptography are enough to resolve the security properties and questions previously described. For instance, today's Web browsers use the public key of a Web site in order to send credit card numbers over the Web. Likewise, one can protect access to files and data using a private symmetric key to scramble the information before saving it.

Though, in practice, each of these problems requires a "certified" public key in order to operate correctly with no third parties being able to interfere. This leads to a second set of questions. For instance, how can you be sure that the public key that your browser uses to send credit card information is in fact the right one for that Web site, and not a bogus one? And, how can you dependably communicate your public keys to your correspondents so that they can rely on it to send you encrypted communications?

What is desirable in order to address such concerns is the notion of a "secure binding" between a given entity that participates in a deal and the public key that is used to bootstrap secure communication with that entity using asymmetric public key cryptography. The next part of the chapter describes how a combination of digital signatures and X.509 digital certificates (which employ digital signatures), as well as SSL certificates, fulfills this role in e-commerce trust systems.

Posted Date: 10/12/2012 8:19:33 AM | Location : United States







Related Discussions:- Modern cryptography systems: a hybrid approach, Assignment Help, Ask Question on Modern cryptography systems: a hybrid approach, Get Answer, Expert's Help, Modern cryptography systems: a hybrid approach Discussions

Write discussion on Modern cryptography systems: a hybrid approach
Your posts are moderated
Related Questions
RISK IN DIGITAL CURRENCY Exchange risk Digital gold currency is a structure of agent money as it openly represents gold metal on drop or in custody, and denominated in un


Question: (a) "The concern of Planners is twofold: to reach a better understanding of the validity of education in its own empirically observed specific dimensions and to help

Purpose of Film Theory: The purpose of film theory is to add to the critical film debate by making changes in the method of study of film and film analysis. It is a conglomerate o

Question 1 The Science Daily dated April 05, 2011 stated that for the some days ozone-depleted air masses had extended from the North Pole to southern Scandinavia resulting in

Disadvantages Traffic overcrowding on the network has been an subject since the inception of the client-server paradigm. As the amount of instantaneous client requests to a

Working of Livelink and SQL Server: Project Name : Livelink- Thomsonfly Airways, UK Airline Role : Day to day interaction with Clients and vendor at Client Location. Pre

what is a biodigester

ACL BASED SECURITY MODEL In an ACL-based security model, when a subject needs to execute an operation on an object, the system first verify the list for an appropriate entry in

I need help with excel