voip architectures and protocols

... 21 23 25 VoIP Architectures and Protocols 29 Architectures VoIP Network Components Signaling Protocols Media Transport Protocols Other IP Protocols ... brief introduction on telephony, and Chapter 2, VoIP Architectures and Protocols, ” provides a high-level discussion of the basic components and protocols that support VoIP to help you quickly assimilate ... 17799/27001 standard,2 for enterprise VoIP networks Finally, Chapter 10, “Provider Architectures and Security,” and Chapter 11, “Enterprise Architectures and Security,” discuss service provider and enterprise...

Ngày tải lên: 25/03/2014, 12:07

... traffic management, differentiated and integrated services, Internet routing protocols and multicast routing protocols, resource reservation and RSVP, and lossless and lossy compression Examines ... about and understanding this important standard The chapter on AES has been revised and expanded, with additional illustrations and a detailed example, to clarify the presentation Examples and ... Ciphers and the Data Encryption Standard C.5 Chapter 4: Basic Concepts in Number Theory and Finite Fields C.6 Chapter 5:Advanced Encryption Standard C.7 Chapter 7: Pseudorandom Number Generation and...

Ngày tải lên: 07/12/2013, 11:53

... Security and VPN,” 2001) Step 5: Measure and Report Network Traffic Statistics for the Computers on Your Network That Are Using the Most Bandwidth Measuring the number of bytes a computer sends and ... Maryland, Baltimore County (UMBC), that have been confirmed in similar tests by other universities, we have attached machines running standard versions of Linux and Windows 2000 on our network and ... OS/X, and Windows 2000/XP and is free The Role of Middleware and Campus Directories The Internet2 Middleware working group defines middleware as a layer of software between the network and the...

Ngày tải lên: 14/02/2014, 16:20

... Comments), and Federal Information Processing Standards (FIPS), issued by the National Institute of Standards and Technology (NIST) A ppendix A discusses the standards-making process and lists the standards ... Recommended Reading and Web Sites 644 Section 20.5 Key Terms, Review Questions, and Problems 645 Appendix A Standards and Standards-Setting Organizations 647 Section A.1 The Importance of Standards 648 ... implemented and are in use today / 526 Cryptography and Network Security Principles and Practices, Fourth Edition • Table of Contents • Index Cryptography and Network Security Principles and Practices,...

Ngày tải lên: 18/02/2014, 08:20

Ngày tải lên: 24/02/2014, 04:20

... anti-virus and anti-spyware tools and keep them up to date Anti-virus and anti-spyware software is available at no fee to all Yale faculty, staff and students Links: ITS 10 Use secure file transfer and ... Systems and Network Security Know your IT support providers and their role in information security All faculty, staff, and students on campus have access to IT support staff Know who they are and ... PR.01 - Systems and Network Security 15 Implement additional security requirements for portable or handheld, and wireless devices Wireless devices (including laptops, smartphones and PDA’s) must...

Ngày tải lên: 05/03/2014, 23:20

... computers to store and retrieve records and we conduct online transactions over building, campus and Internet network connections Information technology yields great efficiencies and analytical power; ... Computer and Network Security: Questions Everyone Should Ask Computer and Network Security: Questions Everyone Should Ask A guide for discussion among business administrators and their information ... staff and management Computer security is a complex subject area to which many books and journal articles have been devoted Computer security also involves the processes used to plan, acquire, and...

Ngày tải lên: 05/03/2014, 23:20

... ● Codes versus ciphering – Codes are stronger, and also achieve data compression Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 Some Popular ... Based on knapsack problem Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 Digital Encryption Standard (DES) 64 bits 64 bits Plain­text P R1 64 bits ... Each round uses a  different 48­bit key  Ki (from K) and a  Ri­1 Li­1 Ri­1 combiner function F F Ki + Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 Triple-DES...

Ngày tải lên: 05/03/2014, 23:20

... traditionally provided by physical and administrative mechanisms computer use requires automated tools to protect files and other stored information use of networks and communications links requires ... the algorithm develop methods to distribute and share the secret information specify a protocol enabling the principals to use the transformation and secret information for a security service ... Course  our focus is on Internet Security  which consists of measures to deter, prevent, detect, and correct security violations that involve the transmission & storage of information Security...

Ngày tải lên: 06/03/2014, 16:20

... count relative letter frequencies (see text) guess P & Z are e and t guess ZW is th and hence ZWP is the proceeding with trial and error finally get: it was disclosed yesterday that several informal ... private-key / single-key sender and recipient share a common key all classical encryption algorithms are private-key was only type prior to invention of public-key in 1970’s and by far most widely used ... their names as vital parts of themselves, and therefore take great pains to conceal their real names, lest these should give to evildisposed persons a handle by which to injure their owners —The...

Ngày tải lên: 06/03/2014, 16:20

... stage  and have “meet-in-the-middle” attack      works whenever use a cipher twice since X = EK1(P) = DK2(C) attack by encrypting P with all keys and store then decrypt C with keys and match ... familiar with all the forms of secret writings, and am myself the author of a trifling monograph upon the subject, in which I analyze one hundred and sixty separate ciphers," said Holmes —The Adventure ... Counter (CTR) Advantages and Limitations of CTR  efficiency    can parallel encryptions in h/w or s/w can preprocess in advance of need good for bursty high speed links  random access to encrypted...

Ngày tải lên: 06/03/2014, 16:20

... algorithmic techniques to create “random numbers”  although are not truly random  can pass many tests of “randomness” known as “pseudorandom numbers” created by “Pseudorandom Number Generators (PRNGs)” ... for cipher use, good for key generation Natural Random Noise    best source is natural randomness in real world find a regular but random event and monitor generally need special h/w to this ... decentralized key distribution controlling key usage Random Numbers  many uses of random numbers in cryptography      nonces in authentication protocols to prevent replay session keys public...

Ngày tải lên: 06/03/2014, 16:20

... factors of are 1,2,4,8 and of 15 are 1,3,5,15 and is the only common factor conversely can determine the greatest common divisor by comparing their prime factorizations and using least powers ... Fermat's Theorem  ap-1  = (mod p) where p is prime and gcd(a,p)=1  also known as Fermat’s Little Theorem  also ap = p (mod p)  useful in public key and primality testing Euler Totient Function ø(n) ... lemmas—" —The Mathematical Magpie, Clifton Fadiman Prime Numbers  prime numbers only have divisors of and self      they cannot be written as a product of other numbers note: is prime, but is generally...

Ngày tải lên: 06/03/2014, 16:20

... Public Key Cryptography and RSA Every Egyptian received two names, which were known respectively as the true name and the good name, or the great name and the little name; and while the good or ... which may be known by anybody, and can be used to encrypt messages, and verify signatures a private-key, known only to the recipient, used to decrypt messages, and sign (create) signatures is ... primes at random - p, q  select either e or d and compute the other primes p,q must not be easily derived from modulus n=p.q  means must be sufficiently large  typically guess and use probabilistic...

Ngày tải lên: 06/03/2014, 16:20

... Good software design should handle failures gracefully – For example, handle exceptions 1/9/07 CIS/TCOM 551 30 #4: Principle of Least Privilege • Recall the Saltzer and Schroeder article • Don't ... • Verifying the identity of a prospective user by demanding a password – Authentication • Shielding the computer to prevent interception and subsequent interpretation of electromagnetic radiation ... computer system (both its hardware and software) – Social aspects of security 1/9/07 CIS/TCOM 551 22 Building Secure Software • Source: book by John Viega and Gary McGraw – Copy on reserve in...

Ngày tải lên: 14/03/2014, 20:20

... CS595-Cryptography and Network Security Information Transferring CS595-Cryptography and Network Security Attack: Interruption CS595-Cryptography and Network Security Attack: Interception CS595-Cryptography and ... Security Attack: Modification CS595-Cryptography and Network Security Attack: Fabrication CS595-Cryptography and Network Security Attacks, Services and Mechanisms ! Security " Action ! Security ... Enhances the security of data processing and transferring ! Security " Detect, mechanism prevent and recover from a security attack CS595-Cryptography and Network Security Important Features of...

Ngày tải lên: 14/03/2014, 20:20

... case System and network administrators typically have insufficient time, knowledge, and skill to address the wide range of demands required to keep today’s complex systems and networks up and running ... priorities, and an organization’s ability to manage and tolerate risk dictate where IT resources are expended and determine the trade-offs among security and function, operational capability, and capacity ... establishment and maintenance of secure configurations and the secure operations of critical assets Most system and network administrators have developed their knowledge of how to protect and secure...

Ngày tải lên: 14/03/2014, 22:20

... “Cryptography and Network Security: Principles and Practice,” 5th Ed, 2011 Washington University in St Louis CSE571S 1-2 ©2011 Raj Jain Standards Organizations National Institute of Standards & Technology ... Center for Education and Research in Information Assurance and Security, http://www.cerias.purdue.edu/about/history/coast/archive/ IETF Security area, sec.ietf.org Computer and Network Security ... sci.crypt.random-numbers alt.security comp.security.misc, comp.security.firewalls, comp.security.announce comp.risks comp.virus Security and Cryptography Forum, http://forums.devshed.com/security -and- cryptography-17/...

Ngày tải lên: 14/03/2014, 22:20

... Exchange Protocols     users could create random private/public D-H keys each time they communicate users could create a known private/public D-H key and publish in a directory, then consulted and ... key and their identity B generates a session key K sends it to A encrypted using the supplied public key A decrypts the session key and both use problem is that an opponent can intercept and ... can compute) KAB is used as session key in private-key encryption scheme between Alice and Bob if Alice and Bob subsequently communicate, they will have the same key as before, unless they choose...

Ngày tải lên: 15/03/2014, 17:20

... Creation  to sign a message   M the sender: generates a random signature key k, k

Ngày tải lên: 15/03/2014, 17:20