etc init d smb the samba initialization file
securing voip networks - threats, vulnerabilities, & countermeasures
Ngày tải lên :
25/03/2014, 12:07
... broadband service, and they use services such as e-mail and the web in their everyday life Necessary cabling to the households existed due to the transition from fixed-line to mobile, and the ... and FUD (Fear, Uncertainty, and Doubt), which can cause a reckless response and hinder the ability to develop an understanding of the strengths and limitations of the deployed technology and ... be protected, upgraded, and updated and potential damages can be restored These are standard processes for all IT administrators Now, take laptops as an example of a mobile device of the future...
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Cryptography and network security principles and practice, 5th edition
Ngày tải lên :
07/12/2013, 11:53
... division mod a mod m Remainder after division of a by m mod, K a K b (mod m) a mod m = b mod m mod, [ a [ b (mod m) a mod m Z b mod m dlog dloga, p(b) Discrete logarithm of the number b for the base ... dramatically expanded the resources for learning about and understanding this important standard The chapter on AES has been revised and expanded, with additional illustrations and a detailed example, ... found in the Recommended Reading and Web Sites section Because the addresses for Web sites tend to change frequently, the book does not provide URLs For all of the Web sites listed in the book, the...
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Tài liệu COMPUTER AND NETWORK SECURITY IN HIGHER EDUCATION doc
Ngày tải lên :
14/02/2014, 16:20
... that the security of the campus directory itself be managed very carefully The Internet2 Middleware initiative developed a business case for implementing middleware in higher education This document ... opportunities in their funding and implementation to enhance the security of the entire campus References Barton, T., and others “Middleware Business Case.” [middleware.internet2.edu/ earlyadopters/draft-internet2-ea-mw-business-case-00.pdf] ... integrating the IDS with the firewall and renaming these intrusion prevention systems When a threat is identified, the IDS automatically works with the firewall to adjust the firewall rules to protect the...
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Tài liệu Cryptography and Network Security Principles and Practices, Fourth Edition ppt
Ngày tải lên :
18/02/2014, 08:20
... division mod a mod m Remainder after division of a by m mod, a b(mod m) a mod m = b mod m mod, a b(mod m) a mod m dlog dloga,p(b) Discrete logarithm of the number b for the base a (mod p) f f (n) The ... considered unbreakable It was used as the standard field system by the British A rmy in World War I and still enjoyed considerable use by the U.S A rmy and other A llied forces during World War ... then the inverse of the matrix is computed as [A 1]ij = (1)i+j (D ij)/ded(A), where (D ij) is the subdeterminant formed by deleting the ith row and the jth column of A and det(A) is the determinant...
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Procedure 1610 PR.01 Systems and Network Security potx
Ngày tải lên :
05/03/2014, 23:20
... computing devices unattended and unlocked Make sure the access to data on the device and the access to the device itself is limited Portable devices such as PDAs, USB memory sticks and laptops ... to drives/directories/files on your local hard drive File sharing should be disabled or restricted and secured ITS provides a Secure File Transfer Facility The File Transfer Facility is located ... be downloaded from the Internet; • Shareware utilities such as so called “Internet Accelerators.” In addition to the concerns listed above, many of these programs are packaged for download with...
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Computer and Network Security: Questions Everyone Should Ask docx
Ngày tải lên :
05/03/2014, 23:20
... desktops? o On all end user desktops? • Are our virus definitions current? o How often are the definitions updated? (At least twice weekly is advised; many experts suggest daily updates.) • Do ... family names and dates, use a password longer than characters, don’t use words found in dictionaries, include numerals in the password) • Do we discourage sharing of user names and passwords among ... Should Ask • Do we regularly change passwords on critical systems? • Do we require end users to change their passwords? How often? • Do we educate end users about good password choices? (e.g avoid...
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Cryptography and Network Security docx
Ngày tải lên :
05/03/2014, 23:20
... third party has modified data – Receiver can prove that only the sender originated the data ● Digital Signature ● E.g., for electronic transactions Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 0913 May 2005 ... ● DES, 3DES Public 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, Kameswari Chebrolu and Bhaskaran Raman, 0913 May 2005 ... Encryption: C = ME mod N Using the secret Phi(N), A can compute D such that ED = mod Phi(N) ● ED = k x Phi(N) + ● Then, for any X < N, Xk x Phi(N)+1 = X mod N Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 0913 May 2005...
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Cryptography and Network Security Chapter 1 doc
Ngày tải lên :
06/03/2014, 16:20
... have signatures, dates; need protection from disclosure, tampering, or destruction; be notarized or witnessed; be recorded or licensed Security Services X.800: “a service provided by a protocol ... generate the secret information (keys) used by the algorithm develop methods to distribute and share the secret information specify a protocol enabling the principals to use the transformation and secret ... use requires automated tools to protect files and other stored information use of networks and communications links requires measures to protect data during transmission Definitions Computer...
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Cryptography and Network Security Chapter 2 pdf
Ngày tải lên :
06/03/2014, 16:20
... savages at the present day regard 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 ... encrypt the corresponding plaintext letter eg using keyword deceptive key: deceptivedeceptivedeceptive plaintext: wearediscoveredsaveyourself ciphertext:ZICVTWQNGRZGVTWAVZHCQYGLMGJ Aids simple ... long as the message Vigenère proposed the autokey cipher with keyword is prefixed to message as key knowing keyword can recover the first few letters use these in turn on the rest of the message...
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Cryptography and Network Security Chapter 6 pptx
Ngày tải lên :
06/03/2014, 16:20
... with DES implementations Triple-DES is the chosen form Double-DES? could use DES encrypts on each block C = EK2(EK1(P)) issue of reduction to single stage and have “meet-in -the- middle” ... broken into independent blocks which are encrypted each block is a value which is substituted, like a codebook, hence name each block is encoded independently of the other blocks Ci = DESK1(Pi) ... 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 of the...
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Cryptography and Network Security Chapter 7 pptx
Ngày tải lên :
06/03/2014, 16:20
... broken the code It was extraordinary the feeling of triumph he had He felt on top of the world For not only had he done it, had he broken the July code, but he now had the key to every future coded ... session then discarded master key used to encrypt session keys shared by user & key distribution center Key Distribution Scenario Key Distribution Issues hierarchies of KDC’s required ... links requires many devices, but paired keys end-to-end encryption encryption occurs between original source and final destination need devices at each end with shared keys Placement of Encryption...
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Cryptography and Network Security Chapter 8 doc
Ngày tải lên :
06/03/2014, 16:20
... than 2, the equation an + bn = cn has no non-trivial solution in the integers." They agreed on a three-day period for the labor, and the Devil disappeared At the end of three days, the Devil presented ... Devil presented himself, haggard, jumpy, biting his lip Daniel Webster said to him, "Well, how did you at my task? Did you prove the theorem?' "Eh? No no, I haven't proved it." "Then I can have ... Chapter – Introduction to Number Theory The Devil said to Daniel Webster: "Set me a task I can't carry out, and I'll give you anything in the world you ask for." Daniel Webster: "Fair...
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Cryptography and Network Security Chapter 9 doc
Ngày tải lên :
06/03/2014, 16:20
... 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 little name was made ... mod n, where 0≤M
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CIS 551 / TCOM 401 Computer and Network Security doc
Ngày tải lên :
14/03/2014, 20:20
... permitted to use the system can – The system protects privacy/secrecy/confidentiality/anonymity – The system can't be abused (Is only used for its designed purpose.) – Detect error conditions ... authorized users – Access control (must check that the user is permitted on access) • Verifying the identity of a prospective user by demanding a password – Authentication • Shielding the computer ... Related to least privileges • Protect personal information – Consider implementing a web pages that accepts credit card information – How should the cards be stored? – What tradeoffs are there...
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Cryptography and Network Security potx
Ngày tải lên :
14/03/2014, 20:20
... Alberti devised a cipher wheel, and described the principles of frequency analysis in the 1460s Blaise de Vigenère published a book on cryptology in 1585, & described the polyalphabetic substitution ... CS595-Cryptography and Network Security Key Management ! Using secret channel ! Encrypt the key ! Third trusted party ! The sender and the receiver generate key " The key must be same CS595-Cryptography and Network ... distance away (use the 3rd letter on) ! Reputedly used by Julius Caesar ! Example: L FDPH L VDZ L FRQTXHUHG I CAME I SAW I CONGUERED " The mapping is ABCDEFGHIJKLMNOPQRSTUVWXYZ DEFGHIJKLMNOPQRSTUVWXYZABC...
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The CERT® Guide to System and Network Security Practices pdf
Ngày tải lên :
14/03/2014, 22:20
... removal and result in, for example, changed mode bits or added accounts Remove all privilege and access and then grant (add back in) privilege and access only as needed, following the principle “deny ... analysis Other parties that may be affected are notified, and evidence is collected and protected in the event of legal proceedings against the intruder Chapter addresses response practices and assumes ... implementation, and a section covering policy considerations that complements these steps and helps ensure that they will be deployed effectively The recommended steps are addressed directly to a mid-level...
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Cryptography and Network Security: Overview potx
Ngày tải lên :
14/03/2014, 22:20
... http://www.wireshark.org/download.html Use ftp client to download in binary mode (do not use browser) b Advanced Port Scanner, network port scanner, http://www.scanwith.com/Advanced_Port_Scanner_download.htm c ... Data Confidentiality –protection of data from unauthorized disclosure Data Integrity - assurance that data received is as sent by an authorized entity Non-Repudiation - protection against denial ... Security Mechanisms These slides are based on Lawrie Brown’s slides supplied with William Stalling’s book “Cryptography and Network Security: Principles and Practice,” 5th Ed, 2011 Washington...
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Cryptography and Network Security Chapter 10 pptx
Ngày tải lên :
15/03/2014, 17:20
... private/public D- H key and publish in a directory, then consulted and used to securely communicate with them both of these are vulnerable to a meet-in -the- Middle Attack authentication of the keys is needed ... public key pair A sends B the public 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 ... best in hardware Elliptic Curve Cryptography ECC addition is analog of modulo multiply ECC repeated addition is analog of modulo exponentiation need “hard” problem equiv to discrete log...
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Cryptography and Network Security Chapter 13 pot
Ngày tải lên :
15/03/2014, 17:20
... disarming the strangers of their magical powers, or of disinfecting, so to speak, the tainted atmosphere by which they are supposed to be surrounded The Golden Bough, Sir James George Frazer Digital ... be verified by third parties to resolve disputes hence include authentication function with additional capabilities Digital Signature Properties must depend on the message signed must use ... third-party key distribution protocol for session between A B mediated by KDC protocol overview is: A->KDC: IDA || IDB || N1 KDC -> A: EKa[Ks || IDB || N1 || EKb[Ks||IDA] ] A -> B: EKb[Ks||IDA]...
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