3—telecommunications and network security

... (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 ... developing its security plan These common elements include network security, computer (or “host”) security, middleware and directory services, and application-based security An IT security architecture ... policies It focuses on reduc-ing security risks and enforcreduc-ing policy through the design and con-figuration of firewalls, routers, and other network equipment Network security is important because

Ngày tải lên: 14/02/2014, 16:20

... 17Implementing Multilevel Security• Dynamic: – Tag all values in memory with their security level – Operations propagate security levels – Must be sure that tags can’t be modified – Expensive, and approximate ... tampering and bypassing of application security mechanisms • Confine damage caused by malicious applications http://www.nsa.gov/selinux/ Trang 21SELinux Security Policy Abstractions• Security-Encanced ... 9Multilevel Security Policies• In general, security levels form a "join semi-lattice" – There is an ordering ≤ on security levels – For any pair of labels L1 and L2 there is an "join"

Ngày tải lên: 22/03/2014, 15:21

... Cryptography and Network Security Third Edition by William Stallings Lecture slides by Lawrie Brown The need • In CERTs 2001 annual report it listed 52,000 security incidents • the ... exploits • eavesdropping and sniffing • attackers listen for userids and passwords and then just walk into target systems • as a result the IAB included authentication and encryption in the next ... to gateway security Transport & Tunnel Modes Encapsulating Security. .. and Key Management Protocol (RFC 2407) • provides framework for key management • defines procedures and packet formats

Ngày tải lên: 23/03/2014, 00:20

... “Designing Network Security”.   APNIC acknowledges her contribution and support with appreciation and thanks. Network Security Basics Why Security?   Security threats are real…   And need ... Cryptography and Public Key Infrastructure   Security on Different Layers   Layer 2 and BGP Security   Server and Operational Security Acknowledgements   Merike Kaeo from Double Shot Security and ... Internet and Network Security Fundamentals Presenters   Champika Wijayatunga Training Manager, APNIC champika@apnic.net Overview   Network Security Basics   Security Issues, Threats and

Ngày tải lên: 28/03/2014, 20:20

... about computer and network security. IT Security and Academic Values Diana Oblinger 1 01chap.qxd 8/31/03 10:02 AM Page 1 2COMPUTER AND NETWORK SECURITY IN HIGHER EDUCATION Unique Culture and Environment Critical ... IT Security and Academic Values Diana Oblinger Computer and Network Security in Higher Education Mark Luker and Rodney Petersen, Editors A Publication of EDUCAUSE 1 T he networks and computer ... or other factors. IT Security and Academic Values 5 01chap.qxd 8/31/03 10:02 AM Page 5 6COMPUTER AND NETWORK SECURITY IN HIGHER EDUCATION It is clear that computer and network security is now essential to

Ngày tải lên: 28/03/2014, 22:20

... Department of 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 ... Correlation 3 1.2 Network Lifetime 3 1.3 Design Characteristics 4 1.4 Security 5 1.5 Trusted Querying 8 2 Network Security Visualization 9 3 Thesis Contribution and Outline 10 II IN-NETWORK DATA AGGREGATION ... trust and provide the essential techniques for establishing trust in sensor networks 2 Network Security Visualization Whenever a network analyzer or administrator uses one of the existing network

Ngày tải lên: 30/10/2014, 20:14

... 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 and LtCol ... to President Trang 3Email Security email is one of the most widely used and regarded network services  currently message contents are not secure system Trang 4Email Security EnhancementsTrang ... documents taken from the files of the National Security Advisor and relevant NSC staff members, including messages from the PROF system between VADM Poindexter and LtCol North The PROF messages were

Ngày tải lên: 18/10/2015, 10:14

... Trang 17.10 Security Protocols7.10.1 Secure Sockets Layer (SSL) 7.10.2 Secure Electronic Transaction™ (SET™) 7.11 Security Attacks 7.12 Network Security 7.12.1 Firewalls Trang 3• Internet security ... Encrypted with public key and private key • Proves identity while maintaining security • RSA public key algorithm www.rsasecurity.com Trang 107.4 Public Key Cryptography • Encrypting and decrypting a message using  ... Number of security attacks increasing – Availability • Computer systems continually accessible Trang 6• Encryption algorithms– Dunn Encryption Standard (DES), Triple DES, Advanced Encryption Standard (AES)

Ngày tải lên: 18/01/2020, 18:03

... 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 mô hình trên đòi hỏi chúng ta phải thiết kế:  ... làm và nghiệm thu 1 bài thực hành 20% (cài đặt các thuật toán, sử dụng các cơ chế bảo mật Java, Sandbox, dotnet, IPsec, SSL, Webservices, lập trình bảo vệ, quyền truy cập, bảo mật cơ sở dữ liệu,chống

Ngày tải lên: 30/01/2020, 10:18

... enforces the security rules and provides complete mediation and isolation 20.13 The Common Criteria (CC) for Information Technology and Security Evaluation is an international initiative by standards ... are used, one between the bastion host and the Internet and one between the bastion host and the internal network This configuration creates an isolated subnetwork, which may consist of simply ... attacks and exploits that take advantage of problems within the TCP/IP specification and protocol stack, such as network layer address spoofing Many packet filter firewalls cannot detect a network

Ngày tải lên: 16/10/2021, 15:40

... port, and password) to participants in the channel 127 128 Hacking Exposed: Network Security Secrets and Solutions It also can act as a standard IRC... defeated the screen saver and ... Hacking Exposed: Network Security Secrets and Solutions Figure 4-7 SnadBoy... who know the file’s location and request it via a nonstandard URL (see http://www.microsoft.com /security/ bulletins/ms99-010.asp ... 130 Hacking Exposed: Network Security Secrets and Solutions it’s not properly configured,... Full Access, 137 138 Hacking Exposed: Network Security Secrets and Solutions no

Ngày tải lên: 14/08/2014, 18:20

... 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

... 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