trusted system in cryptography and network security ppt

... broken into independent 64-bit blocks which are encrypted Ø Ci = DESK1 (Pi) q Cipher Block Chaining (CBC) Ø again the message is broken into 64-bit blocks, but they are linked together in the ... spreading out the influence of each individual plaintext digit over many ciphertext Trang 14Desired EffectØ A characteristic of an encryption algorithm in which a small change in the plaintext ... Horst Feistel, Ø working at IBM Thomas J Watson research labs in early 70's, q The idea is to partition the input block into two halves, l(i-1) and r(i-1), Ø use only r(i-1) in each round i (part)

Ngày tải lên: 22/03/2014, 14:20

... 15Encapsulating Security Payload Security Parameters Index (SPI) Trang 16Combining Security Associations ¢ SA’s can implement either AH or ESP ° to implement both need to combine SA’s ° form a security ... 17Combining Security Associations One or More SAs Tunnel SA b.ESP in transport mode c AH followed by ESP in transport mode(ESP SA inside an AH SA d any one a, b, c inside an AH or ESP.in tunnel ... 1Cryptography and Network Trang 4° applicable to use over LANs, across public & private WANS, & for the Internet Trang 5Networking dev ice with IPSec Trang 6 packet was sent ° insure

Ngày tải lên: 23/03/2014, 00:20

... Trang 1Cryptography and Network SecurityChapter 15 Fourth Edition by William StallingsLecture slides by Lawrie Brown Trang 2Chapter 15 – Electronic Mail Security Despite the refusal of VADM Poindexter ... Zimmermann  selected best available crypto algs to use  integrated into a single program  on Unix, PC, Macintosh and other systems  originally free, now also have commercial versions available ... staff members, including messages from the PROF system between VADM Poindexter and LtCol North The PROF messages were conversations by computer, written at the time events occurred and presumed

Ngày tải lên: 18/10/2015, 10:14

... chứng  Cơ chế an ninh phổ dụng: chức năng tin cậy, nhãn an ninh, phát hiện sự kiện, vết theo dõi an ninh, khôi phục an ninh Trang 23Model for Network SecurityTrang 24Mô hình an ninh mạngSử dụng ... an ninh thông tin Trang 14Tấn công sự an toàn mọi hành động chống lại sự an toàn thông tin của các tổ chức  an toàn thông tin là bàn về bằng cách nào chống lại tấn công vào hệ thống thông tin ... lại bản tin trước  thay đổi ban tin khi truyền  từ chối dịch vụ. Trang 17Tấn công chủ động Trang 18Dich vụ an ninh  Tăng cường an ninh cho các hệ thống xử lý dữ liệu và truyền thông tin của

Ngày tải lên: 30/01/2020, 10:18

... property of a system or a system resource being accessible and usable upon demand by an authorized system entity, according to performance specificationsfor the system (i.e., a system is available ... a binary operation and that is associative and that includes an identity element and an inverse element 4.2 A ring is a set of elements that is closed under two binary operations, addition and ... a key to be determined during any known plaintext attack 6.3 The Merkle-Hellman attack finds the desired two keys K1and K2by finding theplaintext-ciphertext pair such that intermediate value

Ngày tải lên: 16/10/2021, 15:40

... i.e., after each two rounds we obtain the bit complement of the original input, and every four rounds we obtain back the original input: An input to the inverse initial permutation is R 16 L 16 ... original input An input to the inverse initial permutation is R 16 L 16 A function described by (1) and (2) is affine, as bitwise complement is affine, and the other transformations are linear ... the network to the destination terminal.The identities of partners play a crucial role in communication frequency, revealing patterns in message length and quantity that indicate significant information

Ngày tải lên: 11/04/2023, 11:01

... Internet Explorer Inveratonsl Elecstechnesl Commission intligen electonie dedee IEEE Standards Asseiation Interet Security Steering Group Internet Engineering ask Force Internet Ensinwerine Tank Force ... Forwanting information base Fer Identity Credentialing Commies Feral Information Processing Stns Forum of tacit Response and Security Teams Federal Information System: Comols Audit Mangal Feder Information ... Programming Ineace hsjcintl/ouputsj den, Banpin-be-Sack Business Process Modeling Langusg Business Process Specification Schema busines ecovery (resumption) plan base sation base ston contler Tinh

Ngày tải lên: 24/02/2014, 04:20

... Transmitting, transforming, and extending knowledge, as well as promoting the intellectual and moral development of students (Boyer, 1990) • Scholarship Discovering, integrating, evaluating, and preserving ... common set of principles may serve as a starting point for campus discussions about computer and network security IT Security and Academic Values Diana Oblinger 1 Trang 3Unique Culture and EnvironmentCritical ... that of intel-lectual freedom Intelintel-lectual freedom provides for free and open scholarly inquiry, freedom of information, and creative expression, including the right to express ideas and receive

Ngày tải lên: 28/03/2014, 22:20

... passing packets, instead, they contribute in the decision making process The information processing is taking place in the network itself The information is the readings of the sensor data being ... processing technique for WSNs that maximizes the network lifetime is in-network aggregation In-network data aggregation is the simplest form of in-network processing where the sensor nodes in the network ... Computer Science and Engineering, Wright State University, 2009 Trusted Querying over Wireless Sensor Networks and Network Security Visualization Wireless sensor networks (WSNs) as an emerging technology

Ngày tải lên: 30/10/2014, 20:14

... Therefore, if one wants network security and wireless networking, and chooses a bundled product, then one must install a personal firewall on every machine in the house and allow no incoming connections ... that is in multiple security domains, a device in one domain might be able to link to a device in another domain by routing traffic through that PC Preventing this linkage requires proper network ... It does not include security in the basic protocol One can secure UPnP networks by wiring, if there is a single home domain and no wireless or power-line networking However, in more general cases,

Ngày tải lên: 11/12/2013, 15:15

... good or service for which demand rises with an increase in income and falls with a decrease in income The demand for a few luxury goods actually outstrips increases in income A luxury good or service ... market demand curve for Coke, DA+B , is obtained by summing the quantities that individuals A and B are willing to buy at each and every price (shown by the individual demand curves DA and DB ... demand curve Trang 17Changes in Demand The determinants of the elasticity of demand are fewer and easier to identify than the determinants of demand itself As we saw in Chapter 3, the demand

Ngày tải lên: 17/12/2013, 15:18

... Trang 184 Output Devices– Giới thiệu Monitor : CRT / LCD – Giới thiệu Printer : LinePrinter / Laser / InkJet Trang 215 Input DeviceTrang 246 Multi Media Devices – Các loại : Sound card / Micro ... Clock • Xử lý (Processing) • Thiết bị ngoại vi – Output Devices : Monitor, printer, – Input Devices : Keyboard, Mouse, – Multi-Media (CD-ROM, Sound,…) – Communication (Network, I/O Port, ) ... / HeadPhone Trang 277 Communication Devices – Các cổng I/O : LPT, COM, Network Interface, Modem, Router ADSL Trang 338 Main Board (Mother Board) phần Trang 369 Computer case – Giới thiệu công

Ngày tải lên: 23/12/2013, 04:18

... Engineering Social engineering, in this context, is the increasingly prevalent act of obtaining confidential network security information through non-technical means For example, a social engineer ... survey Real and Imagined Threats from the Internet The Internet has undoubtedly become the largest public data network in the world, enabling and facilitating both personal and business communications ... crashing entire computer systems, stealing or damaging confidential data, defacing Web pages, and ultimately disrupting business Some amateur hackers cause damage by merely locating hacking tools

Ngày tải lên: 14/02/2014, 16:20

... are explored in Part Four. Cryptography and Network Security Principles and Practices, Fourth Edition 32 / 526 This increase in attacks coincides with an increased use of the Internet and with increases ... range of concerns of network security. [Page 9] Internetwork security is both fascinating and complex. Some of the reasons follow: 1. Security involving communications and networks is not as simple ... Cryptosystem [View full size image] Cryptography and Network Security Principles and Practices, Fourth Edition 37 / 526 ã Table of Contents ã Index Cryptography and Network Security Principles...

Ngày tải lên: 18/02/2014, 08:20

... blocks being independent blocks being independent  main use is sending a few blocks of data main use is sending a few blocks of data Cryptography and Cryptography and Network Security Network ... Cipher Block Chaining (CBC) Cipher Block Chaining (CBC)  message is broken into blocks message is broken into blocks  linked together in encryption operation linked together in encryption ... equivalent in security nb encrypt & decrypt equivalent in security  if if K1=K2 K1=K2 then can work with single DES then can work with single DES  standardized in ANSI X9.17 & ISO8732 standardized...

Ngày tải lên: 06/03/2014, 16:20

... Natural Random Noise Natural Random Noise  best source is natural randomness in real world best source is natural randomness in real world  find a regular but random event and monitor find a ... (PRNGs)” (PRNGs)” Cryptography and Cryptography and Network Security Network Security Chapter 7 Chapter 7 Fourth Edition Fourth Edition by William Stallings by William Stallings Lecture slides ... Random Numbers Random Numbers  many uses of many uses of random numbers random numbers in cryptography in cryptography  nonces in authentication protocols to prevent replay nonces in...

Ngày tải lên: 06/03/2014, 16:20

... secret keys Cryptography and Cryptography and Network Security Network Security Chapter 10 Chapter 10 Fourth Edition Fourth Edition by William Stallings by William Stallings Lecture slides ... significant load in storing and processing keys and messages and processing keys and messages  an alternative is to use elliptic curves an alternative is to use elliptic curves  offers same security ... participants (and value of key depends on the participants (and their private and public key information) their private and public key information)  based on exponentiation in a finite (Galois)...

Ngày tải lên: 15/03/2014, 17:20

... plain text into blocks and encrypt each independently ● Properties required: – No bit of plain text should appear directly in cipher text – Changing even one bit in plain text should result in ... key systems: – RSA: based on difficulty of factoring – Galois-Field (GF) system: based on difficulty of finding logarithm – Based on knapsack problem Fundamentals of Wired and Wireless Networks, ... K1 again) Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09-13 May 2005 Some Non-Crypto Attacks ● Man -in- the-middle attack: play a trick by being in the...

Ngày tải lên: 05/03/2014, 23:20

... Architecture  ITU-T X.800 Security Architecture for OSI” ITU-T X.800 Security Architecture for OSI”  defines a systematic way of defining and defines a systematic way of defining and providing security requirements providing ... Brown Security Service Security Service  enhance security of data processing systems enhance security of data processing systems and information transfers of an organization and information ... considered: definitions for: definitions for: ã computer, network, internet security computer, network, internet security  X.800 standard X.800 standard  security attacks, services, mechanisms security attacks,...

Ngày tải lên: 06/03/2014, 16:20