introduction to public key cryptography

... Security Theory and Practice. Springer 2009 Putting Things Together  Use all of these functions to create round keys of size 4 words (11 round keys are needed for AES-128; i.e. 44 words) W[0] = K[0, ... string. Divide M into a sequence of blocks: M = M 1 M 2 …M k , such that |M i | = l (padding the last block if necessary)  There are several methods to encrypt M, which are referred to as block-cipher ... equivalent to breaking RC4 encryption  Weak keys: a small portion of the string could determine a large number of bits in the initial permutation, which helps reveal the secret encryption key  Reused...

Ngày tải lên: 17/02/2014, 14:20

... 2009  Alice:  Sends to Bob CA 1 (K A u ) and CA 2 (K u CA1 )  Bob:  Uses CA 2 ’s public key to verify CA 1 ’s public key  Uses CA 1 ’s public key to verify Alice’s public key A CA network consisting ... Concepts of Public- Key Cryptography  3.2 Elementary Concepts and Theorems in Number Theory  3.3 Diffie-Hellman Key Exchange  3.4 RSA Cryptosystem  3.5 Elliptic-Curve Cryptography  3.6 Key Distributions ... Concepts of Public- Key Cryptography  3.2 Elementary Concepts and Theorems in Number Theory  3.3 Diffie-Hellman Key Exchange  3.4 RSA Cryptosystem  3.5 Elliptic-Curve Cryptography  3.6 Key Distributions...

Ngày tải lên: 17/02/2014, 14:20

Ngày tải lên: 14/03/2014, 22:20

Ngày tải lên: 29/03/2014, 15:20

Ngày tải lên: 29/03/2014, 16:20

Ngày tải lên: 11/07/2014, 20:21

... enforceable to the maximum extent permitted by applicable law. An Introduction to Cryptography 13 The Basics of Cryptography Conventional cryptography In conventional cryptography, also called secret -key ... encryption is key distribution: how do you get the key to the recipient without someone intercepting it? Public key cryptography The problems of key distribution are solved by public key cryptography, ... to protect public keys from tampering, to make sure that a public key really belongs to the person to whom it appears to belong. This may be the most important vulnerability of a public key...

Ngày tải lên: 18/10/2013, 17:15

... (probably to his relief). public key private key plaintext ciphertext plaintext decryptionencryption An Introduction to Cryptography An Introduction to Cryptography ... encryption is key distribution: how do you get the key to the recipient without someone intercepting it? Public key cryptography The problems of key distribution are solved by public key cryptography, ... to protect public keys from tampering, to make sure that a public key really belongs to the person to whom it appears to belong. This may be the most important vulnerability of a public key...

Ngày tải lên: 04/11/2013, 20:15

Ngày tải lên: 25/03/2014, 11:02

Ngày tải lên: 25/03/2014, 11:47

Ngày tải lên: 03/07/2014, 16:21

... and cylinder skewing and sector-based sparing with one spare sector per track. This needs to be accounted for in mapping logical blocks to the physical sectors. Adding all these factors results in the ... 97560 sector size 256 bytes 512 bytes cylinders 1449 1962 tracks per cylinder 8 19 data sectors per track 113 72 number of zones 1 1 track skew 34 sectors 8 sectors cylinder skew 43 sectors 18 sectors revolution ... specifications, since the only alternative is to determine them experimentally. The information required to determine how much power to apply to the pivot motor and for how long on a particular seek...

Ngày tải lên: 12/09/2012, 14:16

... beginning to the end (for now)  No backing up to read something again (OK to start over)  Just as done from the keyboard  Writing to a file  Sending output to a file  Done from beginning to end ... up to write something again( OK to start over)  Just as done to the screen Slide 6- 5 Copyright © 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley I/O Streams  I/O refers to ... output  Input is delivered to your program via a stream object  Input can be from  The keyboard  A file  Output is delivered to the output device via a stream object  Output can be to  The screen  A...

Ngày tải lên: 12/09/2012, 22:49

... using complementary metal oxide semiconductor (CMOS) transistors. They used no resistors and inductors, and the whole circuit was fabricated by the 28 INTRODUCTION TABLE 1.3 ADCs Currently Available Sampling ... transistors were introduced and fil- ters were designed without inductors to realize the transfer functions. The design procedure was much simpler, and device technology also was improved to fabri- cate ... vacuum tubes and bipolar junction transistors were developed, the design procedure had to be changed in order to integrate the models for these active devices into the filter circuits, but the mathematical...

Ngày tải lên: 13/09/2012, 10:21

... access data stored in a central database – Delivers broadband connectivity to schools, libraries, and government buildings – Provides free Internet access to residents and attracts visitors and ... channels 6 Bluetooth and Ultra Wide Band • Radio frequency identification device (RFID) tags – Small chips containing radio transponders • Can be used to track inventory • Bluetooth and Ultra ... manager – Special software that helps identify other Bluetooth devices 8 Bluetooth and Ultra Wide Band (continued) • Bluetooth – Distance: up to 33 feet (10 meters) – Bandwidth: 1 Mbps • Ultra Wide...

Ngày tải lên: 13/09/2012, 10:52

... 2 Objectives  To introduce software engineering and to explain its importance  To set out the answers to key questions about software engineering  To introduce ethical and professional issues and to explain ... developed for a particular customer or may be developed for a general market.  Software products may be • Generic - developed to be sold to a range of different customers e.g. PC software such ... what the customer wants • Evolution - changing the software in response to changing demands. ©Ian Sommerville 2004 Software Engineering, 7th edition. Chapter 1 Slide 1 An Introduction to Software Engineering ©Ian...

Ngày tải lên: 14/09/2012, 11:26

... comes to using LVM effectively it is worth considering the filesystem that you wish to use upon your logical volumes. http://www.debian-administration.org/articles/410 A simple introduction to ... be a little confusing to newcomer so this guide intends to show the basics in a simple manner. There several pieces of terminology that you'll need to understand to make the best use of ... (ie. 4x5Gb drives can be combined into one 20Gb volume group, and you can then create two 10Gb logical volumes.) Logically these are stacked from top to bottom like this: can create a dedicated...

Ngày tải lên: 18/09/2012, 10:12

... contributes to regulatory enforcement and compliance. As we shall see, central to the study of regulatory enforcement is the width of discretion within regulatory systems (in the hands of both public ... first, to consider the extent to which the analytic map developed in the first four chapters transposes to regulation in the supranational context, and second, to consider whether the shift to regu- lation ... previously encountered. Many often struggled to identify how these strands related to each other or, indeed, to the legal tradition to which they were accustomed. In short, there was an acute need...

Ngày tải lên: 21/09/2012, 10:39