introduction to cryptography - principles & applications, 2nd ed

... messages are exchanged in the above protocol. Therefore, it is called the three-way or three-pass authentication protocol. There are also two-way authentication protocols. To prevent replay at- tacks, the ... practice to use public-key encryption for this purpose. 1.2 The Objectives of Cryptography Providing confidentiality is not the only objective of cryptography. Cryptog- raphy is al...

Ngày tải lên: 25/03/2014, 11:47

. minimized. On the other hand, in feature extruetion for- classif- cation, mapping is not limited to any specific form and the class separability is used as the criterion to be optimized.. This process is called learning or training, and samples used to design a classifier are called learning or training samples. The discussion can be easily extended to multi-category cases.. subject...

Ngày tải lên: 31/03/2014, 16:24

... Introduction to Cryptography 13 The Basics of Cryptography Conventional cryptography In conventional cryptography, also called secret-key or symmetric-key encryption, one key is used both for ... 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...

Ngày tải lên: 18/10/2013, 17:15

... Introduction to Cryptography 13 The Basics of Cryptography Conventional cryptography In conventional cryptography, also called secret-key or symmetric-key encryption, one key is used both for ... with. An Introduction to Cryptography An Introduction to Cryptography 19 The Basics of Cryptography The basic manner in which digital signatures are created is illustrated i...

Ngày tải lên: 04/11/2013, 20:15

... nuclear medicine has progressively increased with increasing miniaturisation of the photomultiplier tubes used in its detectors and improve- ments to collimators. Computerised Tomography ... Century, medicine was becoming more formalised. Anatomical knowledge progressively improved, and al- though the topics of pathology and physiology were recognised, they had advanced little ... c...

Ngày tải lên: 15/03/2014, 12:20

... sometimes an atomic-scale bump sticking out of the object would get caught behind an atomic-scale ridge on the table. As the object continued to move, the bonds to the hung-up atoms stretch or ... Since the atomic motion is essentially random, there are just as many atoms travelling to the right with a given speed as to the left. Even though individual atomic speeds may be hundreds of...

Ngày tải lên: 17/03/2014, 15:00

... unchanged, maps b to t and t to b, e to q and q to e, etc. A toy Enigma machine (limited to 6 letters) is represented in Figure 1.3. Lampboard Kevboard Plugboard Rotor 1 Rotor ... 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 cryptog...

Ngày tải lên: 25/03/2014, 11:02

. stopping them, deciding where they can roam, and determining what they are going to do when they get there. I1 I1 I1 I1 I1 II - - - - - - - - - - - - - - - - - - - - - - -. opening nce was: I' It was a dark and . C - ,, "," as. .I.= J." U".U .". " =.a to foll deligt nignr; re rain reit in rorrenrs- cept at occasional...

Ngày tải lên: 18/04/2014, 11:07

... fondly dedicated to this remarkable person. Jamal Nazrul Islam Chittagong, 1991 x Preface to the first edition TLFeBOOK Preface to the second edition The material in the earlier edition, to which ... been added to the introduction to general relativity, such as Killing vectors. Not all these topics are used later in the book, but some may be of use to the beginning student for...

Ngày tải lên: 17/03/2014, 13:33