By Dr. William J. Buchanan (auth.)
Read Online or Download Advanced Data Communications and Networks PDF
Best network security books
Trustworthy, versatile, and configurable sufficient to unravel the mail routing wishes of any site, sendmail has withstood the try out of time, yet has turn into no much less daunting in its complexity. Even the main skilled approach directors have chanced on it tough to configure and hard to appreciate. For assist in unraveling its intricacies, sendmail directors have became unanimously to at least one trustworthy resource - the bat publication, or sendmail by means of Bryan Costales and the writer of sendmail, Eric Allman.
This publication introduces a number of sign processing ways to augment actual layer secrecy in multi-antenna instant structures. instant actual layer secrecy has attracted a lot awareness in recent times as a result of broadcast nature of the instant medium and its inherent vulnerability to eavesdropping.
This ebook examines technological and social occasions in the course of 2011 and 2012, a interval that observed the increase of the hacktivist, the movement to cellular systems, and the ubiquity of social networks. It covers key technological matters similar to hacking, cyber-crime, cyber-security and cyber-warfare, the net, shrewdpermanent telephones, digital defense, and knowledge privateness.
This publication is written in this kind of manner that readers can commence utilizing the framework correct from the notice cross. From exploiting to auditing, it indicates you striking how you can hinder assaults from hackers. The chapters are designed to stability the speculation in addition to the sensible wishes of a learner. rapid Metasploit Starter starts with establishing your digital lab as an attacker and a sufferer.
- Targeted Cyber Attacks. Multi-staged Attacks Driven by Exploits and Malware
- Information Security and Cryptology - ICISC 2014: 17th International Conference, Seoul, South Korea, December 3-5, 2014, Revised Selected Papers
- Building a Comprehensive IT Security Program: Practical Guidelines and Best Practices
- Self- and Co-regulation in Cybercrime, Cybersecurity and National Security
- On Privacy-Preserving Protocols for Smart Metering Systems: Security and Privacy in Smart Grids
Additional resources for Advanced Data Communications and Networks
1 Entropy coding Entropy coding does not take into account the characteristics of the data and treats all the bits in the same way; it produces lossless coding. Typically it uses: • Statistical encoding - where the coding analyses the statistical pattern of the data. For example if a source of text contains many more 'e' characters than 'z' characters then the character 'e' could be coded with very few bits and the character 'z' with many bits. • Suppressing repetitive sequences - many sources of information contain large amount of receptive data.
I _ _ II _ _ II _ _ IL... I I I I I J - ~ - of -~ - -:--:- -i--.!. ;. - tI __ ~_L_~ '_~_~ __ . _l_l_J_~--~-L-~-l-~-J--. _~_~_~_J -, -1-1- -rT -r -t -, -'-1- -. 1 Introduction Most sources of information contain redundant information or information that adds little to the stored data. An example of this might be the storage of a rectangular image. As a single color bitmapped image it could be stored as: 000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000 000000000011111111111111111111111111000000000 000000000010000000000000000000000001000000000 000000000010000000000000000000000001000000000 000000000010000000000000000000000001000000000 000000000010000000000000000000000001000000000 000000000010000000000000000000000001000000000 000000000011111111111111111111111111000000000 000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000 An improved method might be to store the image as a graphics metafile, such as: Rectangle 11, 4, 26, 7 rectangle at start co-ordinate (1 1,4) of width 26 and length 7 pixels or to compress long sequences of identical bit states, such as: 0,45 0,45 0,45 0,10 0,10 0,10 0,10 0,10 0,10 0,10 0,45 0,45 ; 45 bits of a ; 45 bits of a ; 45 bits of a 1,26 0,9 ; 10 bits 1,1 0,24 1,1 0,9 1,1 0,24 1,1 0,9 1,1 0,24 1,1 0,9 1,1 0,24 1,1 0,9 1,1 0,24 1,1 0,9 1,26 0,9 ' 0' '0' '0' of a '0', 26 1'5 and 9 0'5 Data compression is becoming an important subject as more and more digital 16 Advanced data communications information is required to be stored and transmitted.
E' 57 - - . 'e' 57 -----.. 'e' 57 'i' 51 ---.. 'if ~'i' '0' 33 ----. '0' 33 'p' 20 ----. 1 Huffman coding example The fmal coding will be: 11 10 00 011 0101 0100 'e' 'i' '0' 'p' 'b' 'c' The great advantage of Huffman coding is that, although each character is coded with a different number of bits, the receiver will automatically determine the character whatever their order. For example if a 1 is followed by a 1 then the received character is an 'e'. If it is followed by a 0 then it is an '0'.