introduction to applied cryptography symmetric ciphers

... I Introduction and Classical Cryptography Introduction and Classical Ciphers 1.1 Cryptography and Modern Cryptography 1.2 The Setting of Private-Key Encryption 1.3 Historical Ciphers ... Part I Introduction and Classical Cryptography Chapter Introduction and Classical Ciphers 1.1 Cryptography and Modern Cryptography The Concise Oxford Dictionary (2006) defines cryptography as ... classical cryptography (say, before the 1980s) and modern cryptography relates to who uses it Historically, the major consumers of cryptography were military and intelligence organizations Today,...

Ngày tải lên: 23/08/2015, 21:10

... cryptographic algorithm, plus all possible keys and all the protocols that make it work comprise a cryptosystem PGP is a cryptosystem 12 An Introduction to Cryptography The Basics of Cryptography ... Schneier, Applied Cryptography: Protocols, Algorithms, and Source Code in C PGP is also about the latter sort of cryptography Cryptography can be strong or weak, as explained above Cryptographic ... 1-1 Encryption and decryption What is cryptography? Cryptography is the science of using mathematics to encrypt and decrypt data Cryptography enables you to store sensitive information or transmit...

Ngày tải lên: 18/10/2013, 17:15

... cryptographic algorithm, plus all possible keys and all the protocols that make it work comprise a cryptosystem PGP is a cryptosystem 12 An Introduction to Cryptography The Basics of Cryptography ... Schneier, Applied Cryptography: Protocols, Algorithms, and Source Code in C PGP is also about the latter sort of cryptography Cryptography can be strong or weak, as explained above Cryptographic ... 1-1 Encryption and decryption What is cryptography? Cryptography is the science of using mathematics to encrypt and decrypt data Cryptography enables you to store sensitive information or transmit...

Ngày tải lên: 04/11/2013, 20:15

... unchanged, maps b to t and t to b, e to q and q to e, etc A toy Enigma machine (limited to letters) is represented in Figure 1.3 Lampboard Kevboard Plugboard Rotor Rotor Rotor Reflector Figure 1.3 ... the Cryptography and Security lecture at EPFL from 2000 to mid-2005 It covers a majority of the subjects that make up today's cryptology, such as symmetric or public-key cryptography, cryptographic ... A CLASSICAL INTRODUCTION TO CRYPTOGRAPHY EXERCISE BOOK A CLASSICAL INTRODUCTION TO CRYPTOGRAPHY EXERCISE BOOK Thomas Baignkres EPFL, Switzerland...

Ngày tải lên: 25/03/2014, 11:02

... practice to use public-key encryption for this purpose 1.2 The Objectives of Cryptography Providing confidentiality is not the only objective of cryptography Cryptography is also used to provide ... not to sign the message itself, but to apply a cryptographic hash function (see Section 3.4) first and then sign the hash value In schemes For the long history of cryptography, see [Kahn67] 4 Introduction ... signatures 3.1 The Concept of Public-Key Cryptography Classical symmetric cryptography provides a secure communication channel to each pair of users In order to establish such a channel, the users...

Ngày tải lên: 25/03/2014, 11:47

... first made according to Table 1.22 That is, A maps to AA (row A, column A) B maps to AB C maps to AC Q maps to DB Y maps to EE Z maps to DB (Note that the letters Q and Z map to the same pair When ... powerful ciphers Many modern ciphers are based on this idea 1.15 POLYGRAM SUBSTITUTION CIPHERS Mapping single letters to single letters is far too vulnerable to be useful Thus, cryptographers ... CONSTRUCTORS For constructors, we should have the following: An Int constructor which can convert an atomic type int to an Int, One which can convert a string into an Int, One which copies an Int to...

Ngày tải lên: 26/10/2014, 20:34

... 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 19 data sectors per track 113 72 number of zones 1 track skew 34 sectors sectors cylinder skew 43 sectors 18 sectors ... 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 ... fails, it is generally best to stop the program The function exit, halts a program  exit returns its argument to the operating system  exit causes program execution to stop  exit is NOT a member ... flag is an instruction to one of two options ios::fixed is a flag Will be written in fixed-point notation, the way we normally expect to see numbers Calls to setf apply only to the stream named...

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 20 INTRODUCTION very large scale integration ... may have to tune each of them to correct for manufacturing tolerances, but there is no such need to test the accuracy of the wordlength in digital filters Data on digital filters can be stored on ... the ability to understand the solution to the problems is important but understanding the theory behind them is far more important The following paragraphs are addressed to the instructors teaching...

Ngày tải lên: 13/09/2012, 10:21

... software that helps identify other Bluetooth devices Bluetooth and Ultra Wide Band (continued) Bluetooth and Ultra Wide Band (continued) • Bluetooth – Distance: up to 33 feet (10 meters) – Bandwidth: ... (continued) 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 ... Used to transmit data over very long distance • Repeater – Located in the satellite itself – Simply “repeats” the same signal to another location – Used to transmit data from one earth station to...

Ngày tải lên: 13/09/2012, 10:52

... 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 ... systems that are intended to provide automated support for software process activities CASE systems are often used for method support Upper-CASE  Lower-CASE   • • Tools to support the early process ... engineers should adopt a systematic and organised approach to their work and use appropriate tools and techniques depending on the problem to be solved, the development constraints and the resources...

Ngày tải lên: 14/09/2012, 11:26

... let me know Closing Comments If you're ready to make the jump to LVM and don't have a lot of space handy for allocating to LVM then it might make sense to reinstall your system The Debian installer ... you really want to remove active logical volume "test"? [y/n]: y Logical volume "test" successfully removed Other userful commands include lvrename to change the name, and lvreduce to reduce the ... volumes What we really want to is create logical volumes which we can mount and actually use In the future if we run out of space on this volume we can resize it to gain more storage Depending on the...

Ngày tải lên: 18/09/2012, 10:12

... regulatory tools and techniques is to advocate combining techniques rather than relying upon any single instrument: an approach often referred to as a ‘regulatory toolbox’ approach As the toolbox ... invoking the expansion of choice available to citizens Yet both failed to give credence to the incapacity of particular sectors of the Introduction community to avail themselves of essential commodities, ... theoretical framework that can be applied to any social sector This timely textbook provides a conceptual map of the field and an accessible and critical introduction to the subject Morgan and Yeung...

Ngày tải lên: 21/09/2012, 10:39

... philosophers of mind tend to distort or oversimplify the historical Descartes’s views, but this is not the place for me to engage with them over that issue 10 An introduction to the philosophy of ... about this Secondly, if they mean to abandon reasoned argument altogether, even in defence of their own position, then I have Introduction nothing more to say to them because they have excluded ... in which these topics are covered has been deliberately chosen so as to enable the reader to build upon the understanding gained from earlier chapters in getting to grips with the topics of later...

Ngày tải lên: 21/09/2012, 10:39

... feels obliged to take If to permit the expression of humanity is to tolerate the antisocial expression of youth power, this might also be to allow the rapists into your own home, into the writer’s ... to flee to the US to escape the totalitarian state that may result from the continuing appeasement of Hitler As a consequence, there is a mood of ‘dissolution’ in which private miseries seem to ... girlfriend he refuses to marry) convey an attachment to place that belies his stated intention to emigrate In this way Cooper manages to play two contexts off against each other: historical hindsight...

Ngày tải lên: 21/09/2012, 11:00

... franchisor and franchise system to the prospective franchisee An Introduction To Franchising THE IFA EDUCATIONAL FOUNDATION WHAT ARE THE ALTERNATIVES TO FRANCHISING? In addition to franchising, there are ... distributorships ✔ licensing PRODUCER EMPLOYEE PRODUCER/ SELLER PRODUCER/ LICENSOR INDEPENDENT DISTRIBUTOR LICENSEE PRODUCER/ FRANCHISOR FRANCHISEE CUSTOMERS In a distributorship, the distributor ... are similar to franchises, and vice versa A franchisee with a great deal of leeway in how to run the business may look like an independent distributor A distributor may be subject to many controls...

Ngày tải lên: 19/10/2012, 15:42

... origin of the ship is not clear, but it is easy to imagine the course of progress from log to raft, from manual propulsion to sails, and from river to ocean navigation The Phoenicians and Egyptians ... used by a citizen in those days is said to be approximately 180litres Today, the amount of water used per capita per day in an average household is said to be approximately 240 litres Therefore, ... the history of the city water system is very old But in the development process of city water systems, in order to transport water effectively, the shape and size of the water conduit had to be...

Ngày tải lên: 22/10/2012, 10:59

... only too well known There are so many scientific terms named after Newton (Newton's rings and Newton's law of motion/ viscosity/resistance) that he can be regarded as the greatest contributor to ... 14.21 15.12 16.04 16.98 Stokes’ equation, to be stated in Section 9.3.3, is utilised for measuring the viscosity, it is named after him), while its 1/ 100th part is cSt (centistokes) Thus I s t = ... tension 13 sensitivity to temperature is expressed by the viscosity index VI,' a non-dimensional number A VI of 100 is assigned to the least temperature sensitive oil and to the most sensitive...

Ngày tải lên: 22/10/2012, 10:59

... The fluid pressure applied to a fluid in a closed vessel is transmitted to all parts at the same pressure value as that applied (Pascal’s law) In Fig 3.3, when the small piston of area A, is acted ... (3.26) into (3.25) to calculate y, (3.27) Parallel a x b theorem: The moment of inertia with respect to any axis equals the sum of the moment of inertia with respect to the axis parallel to this ... to water pressure, such as the bank of a dam, the sluice gate of a dam or the wall of a water tank? How large must the torque be to open the sluice gate of a dam? What is the force required to...

Ngày tải lên: 22/10/2012, 10:59