3—telecommunications and network security

... layer and computer networks, security, and network management ISBN 0-13141098-9 AND DATA COMMUNICATIONS TECHNOLOGY NETWORK SECURITY ESSENTIALS, FOURTH EDITION A tutorial and survey on network security ... algorithms and security protocols to provide security over networks and the Internet Topics covered include transport-level security, wireless network security, e-mail security, and IP security ... a network security capability are explored by providing a tutorial and survey of cryptography and network security technology The latter part of the book deals with the practice of network security: ...

Ngày tải lên: 07/12/2013, 11:53

... (Fraser, 1997) Network Security Network security architecture is the planning and design of the campus network to reduce security risks in accordance with the institution’s risk analysis and security ... improving security on wireless networks (“Wireless Security and VPN,” 2001) Step 5: Measure and Report Network Traffic Statistics for the Computers on Your Network That Are Using the Most Bandwidth ... policies It focuses on reducing security risks and enforcing policy through the design and configuration of firewalls, routers, and other network equipment Network security is important because it...

Ngày tải lên: 14/02/2014, 16:20

... cryptography and network security IETF Security Area: Material related to Internet security standardization efforts Computer and Network Security Reference Index: A good index to vendor and commercial ... 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, ... cryptography and network security technology The latter part of the book deals with the practice of network security: practical applications that have been implemented and are in use to provide network security...

Ngày tải lên: 18/02/2014, 08:20

Ngày tải lên: 24/02/2014, 04:20

... 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 ... Systems and Network Security Use up-to-date protections against malicious software Install the University provided anti-virus and anti-spyware tools and keep them up to date Anti-virus and anti-spyware...

Ngày tải lên: 05/03/2014, 23:20

... 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 ... data security requirements and applicable state or federal laws and regulations (e.g FERPA, HIPAA, Gramm-Leach-Bliley Act)? Intrusion Detection and Recovery • Assume this scenario: The network security ... 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

... Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 Security Guarantees ● Two possibilities: – – ● Unconditional Computational security Unconditional security: ... systems have computational security – How much security to have? – Depends on cost-benefit analysis for attacker Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 ... Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 Cryptographic Authentication Eavesdropper Sender P C' Encryption C = SK(P) ● Network Key: K Decryption...

Ngày tải lên: 05/03/2014, 23:20

...  pervasive security mechanisms:  trusted functionality, security labels, event detection, security audit trails, security recovery Model for Network Security Model for Network Security  using ... Aspects of Security  consider aspects of information security:    security attack security mechanism security service Security Attack      any action that compromises the security of ... enabling the principals to use the transformation and secret information for a security service Model for Network Access Security Model for Network Access Security  using this model requires us to:...

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 ... each letter is replaced by the letter in the same row and in the column of the other letter of the pair Security of Playfair Cipher      security much improved over monoalphabetic since have ... can identify plaintext select ciphertext and obtain plaintext chosen text  select plaintext or ciphertext to en/decrypt More Definitions  unconditional security   no matter how much computer...

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 ... sequence    C = EK1(DK2(EK1(P))) nb encrypt & decrypt equivalent in security if K1=K2 then can work with single DES  standardized in ANSI X9.17 & ISO8732  no current known practical attacks...

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 ... compensate for this when sample and use best to only use a few noisiest bits from each sample Published Sources   a few published collections of random numbers Rand Co, in 1955, published million...

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

... Software Security / Malicious Code – Buffer overflows, viruses, worms, protection mechanisms • System Security – Hacker behavior, intrusion & anomaly detection, hacker and admin tools • Networks ... and web pages – Lecture slides will be available on the course web pages – Student scribes: Designated note takers 1/9/07 CIS/TCOM 551 Prerequisites • Would like to learn about computer and network ... examples 1/9/07 CIS/TCOM 551 11 Slashdot Security Headlines in 2007 • • • • • • • • • • • • • • • • Microsoft Gets Help From NSA for Vista Security NYT Security Tip - Choose Non-Microsoft Products...

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 ... CS595-Cryptography and Network Security Attack: Modification CS595-Cryptography and Network Security Attack: Fabrication CS595-Cryptography and Network Security Attacks, Services and Mechanisms ! Security ... CS595-Cryptography and Network Security Network Security Model Trusted Third Party principal principal Security transformation Security transformation opponent CS595-Cryptography and Network Security Cryptography...

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 ... GUIDE TO SYSTEM AND NETWORK SECURITY PRACTICES Tech tips contain information on a number of Internet security issues and guidance on specific topics to secure and protect UNIX and Windows NT systems ... 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...

Ngày tải lên: 14/03/2014, 22:20

... 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 Reference ... and Forums           sci.crypt.research, sci.crypt, sci.crypt.random-numbers alt .security comp .security. misc, comp .security. firewalls, comp .security. announce comp.risks comp.virus Security ...   NIST, IETF, ITU-T, ISO develop standards for network security CIA represents the key components of security ISO X.800 security architecture specifies security attacks, services, mechanisms...

Ngày tải lên: 14/03/2014, 22:20

... 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 ... depends on the participants (and their private and public key information) based on exponentiation in a finite (Galois) field (modulo a prime or a polynomial) - easy security relies on the difficulty ... 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 used to securely...

Ngày tải lên: 15/03/2014, 17:20

... Algorithm (DSA)  creates a 320 bit signature  with 512-1024 bit security  smaller and faster than RSA  a digital signature scheme only  security depends on difficulty of computing discrete logarithms ... Creation  to sign a message   M the sender: generates a random signature key k, k

Ngày tải lên: 15/03/2014, 17:20

... bits of message to random key bits CS595-Cryptography and Network Security Cont Key Key Plaintext Ciphertext Ciphertext CS595-Cryptography and Network Security Plaintext Pros and Cons q Drawbacks ... software) Will call these p-boxes CS595-Cryptography and Network Security Cont CS595-Cryptography and Network Security Substitution-permutation Network q Shannon combined these two primitives q ... incorporates one stage of the S-P network, controlled by part of the key k(i) known as the ith subkey CS595-Cryptography and Network Security Cont CS595-Cryptography and Network Security Cont q This can...

Ngày tải lên: 22/03/2014, 14:20