Computer network security

Intrusion Detection (ID) is one of the active branches in network security research field. Many technologies, such as neural networks, fuzzy logic and genetic algorithms have been applied in intrusion detection and the results are varied. In this thesis, an Artificial Immune System (AIS) based intrusion detection is explored. AIS is a bio-inspired computing paradigm that has been applied in many different areas including intrusion detection.

74p runthenight07 01-03-2023 6 2   Download

This thesis proposes and implements a new and novel solution on simulators and real devices to solve the mobility problem in a VPN. The new solution adds mobility support to existing L2TP/IPsec (Layer 2 Tunneling Protocol/IP Security) tunnels. The new solution tunnels Layer 2 packets between VPN clients and a VPN server without using Mobile IP, without incurring tunnel-re-establishment at handoff, without losing packets during handoff, achieves better security than current mobility solutions for VPN, and supports fast handoff in IPv4 networks.

123p runthenight07 01-03-2023 3 2   Download

This paper proposes a new approach which combines different classifiers in order to make best use of each classifier. To build the new model, we evaluate the accuracy and performance (training and testing time) of three classification algorithms: ID3, Naitive Bayes and SVM.

8p tamynhan8 04-11-2020 12 2   Download

In this paper, a novel method is presented to detect spam content on the web. It is based on classification and employs an idea from biology, namely, danger theory, to guide the use of different classifiers. The evaluation of content features of WEBSPAM-UK2007 data set using 10-fold cross-validation demonstrates that this method provides high evaluation criteria in detecting web spam.

13p byphasse043256 23-03-2019 24 1   Download

In this paper, the authors use analytical method of explore factor analysis to determining factors that are components of the training quality (by service quality) at Lac Hong University (LHU) in Dong Nai province. This paper conducted during the period from from June 2012 to June, 2015. The exploratory factor analysis result showed that there were four factors, which included of factors following Teaching (Lecturers); Facilitie.

7p byphasse043256 23-03-2019 28 0   Download

Module 2: Automating an installation of Microsoft Windows XP Professional. The following topics are covered in this module: Introduction to automating an installation of Windows XP Professional; creating answer files; creating a uniqueness database file; performing an automated installation of Windows XP Professional; overview of creating and deploying an image; preparing a reference computer; creating, testing, and deploying an image; managing security settings by using security center.

42p nomoney2 10-02-2017 45 3   Download

Chapter 11 - Incident response. The main contents of this chapter include all of the following: Incident response overview, computer forensics defined, contemporary issues in computer forensics, forensic process, forensic tools, forensic problems, the future of computer forensics.

90p nhanmotchut_3 20-10-2016 44 5   Download

In this chapter, students will be able to understand: Password policies ensure that users choose effective passwords; user-level security requires a separate account for each user; in share-level security, all users access shares by using the same passwords; a firewall is a hardware or software product that protects a network from unauthorized access, using techniques such as packet filtering, NAT, or proxy servers;...

15p tangtuy08 21-04-2016 34 2   Download

Với 7 bài học gồm nhiều chủ đề về công nghệ thông tin, sử dụng các bài đọc và hình minh họa được trích từ sách, báo, các tạp chí chuyên ngành máy tính, Internet, trang Web, sách hướng dẫn và các mẫu tin quảng cáo nhằm giúp học viên thu nhận và phát triển những kỹ năng cần thiết để học các chuyên ngành Công nghệ thông tin sau này. Giáo trình gồm 2 phần, sau đây là phần 1 với nội dung của 4 chủ đề đầu tiên. Mời các bạn cùng tham khảo.

113p uocvongxua03 16-06-2015 1158 173   Download

WLAN technologies are becoming increasingly popular, and promise to be the platform for many future applications: Home Entertainment Networking Example WLAN/WPAN Technologies: IEEE 802.11

34p muathu_102 28-01-2013 83 23   Download

Các máy chủ Web (Webserver) luôn là những vùng đất màu mỡ cho các hacker tìm kiếm các thông tin giá trị hay gây rối vì một mục đích nào đó. Hiểm hoạ có thể là bất cứ cái gì từ kiểu tấn công từ chối dịch vụ, quảng cáo các website có nội dung không lành mạnh, xoá, thay đổi nội dung các file hay phần mềm chứa mã nguy hiểm. Bài viết dưới đây được trình bày như những lời khuyên cho việc đảm bảo an toàn cho các máy chủ Web....

42p muathu_102 28-01-2013 139 49   Download

IEEE 802.11 is a set of standards for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6, 5 and 60 GHz frequency bands. They are created and maintained by the IEEE LAN/MAN Standards Committee (IEEE 802). The base version of the standard was released in 1997 and has had subsequent amendments. These standards provide the basis for wireless network products using the Wi-Fi brand.

18p muathu_102 28-01-2013 55 5   Download

Tham khảo bài thuyết trình 'security protocols: they’re so not easy!', công nghệ thông tin, an ninh - bảo mật phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả

30p muathu_102 28-01-2013 40 4   Download

For distributed systems and networks, we often should assume that there are adversaries Everywhere in the network Adversary may: eavesdrop, manipulate, inject, alter, duplicate, reroute, etc… Adversary may control a large number of network nodes that are geographically separated Dolev-Yao Threat Model: A very powerful adversarial model that is widely accepted as the standard by which cryptographic protocols should be evaluated Eve, the adversary, can: Obtain any message passing through the network Act as a legitimate user of the network (i.e.

26p muathu_102 28-01-2013 57 1   Download

The Web has become the visible interface of the Internet Many corporations now use the Web for advertising, marketing and sales Web servers might be easy to use but… Complicated to configure correctly and difficult to build without security flaws They can serve as a security hole by which an adversary might be able to access other data and computer systems

19p muathu_102 28-01-2013 46 4   Download

Lots of users and privileges scattered over many platforms and applications. Who are the valid users? What are they entitled to access?How do you keep access rights up-to-date? How do you specify and enforce policy?

29p muathu_102 28-01-2013 46 2   Download

Wireless technology has enormous potential to change the way people and things communicate. Future wireless networks will allow people on the move to communicate with anyone, anywhere, and at any time using a range of high-performance multimedia services. Wireless video will support applications such as enhanced social networking, distance learning and remote medicine. Wireless sensor networks can also enable a new class of intelligent home electronics, smart and energy-efficient buildings and highways, and in-body networks for analysis and treatment of medical conditions....

33p muathu_102 28-01-2013 74 5   Download

Up to this point we have seen: Classical Crypto Symmetric Crypto Asymmetric Crypto These systems have focused on issues of confidentiality: Ensuring that an adversary cannot infer the original plaintext message, or cannot learn any information about the original plaintext from the ciphertext. In today’s lecture we will put a more formal framework around the notion of what information is, and use this to provide a definition of security from an information-theoretic point of view.

24p muathu_102 28-01-2013 71 6   Download

A WLAN is a shared network. An access point is a shared device and functions like a shared Ethernet hub. Data is transmitted over radio waves. Two-way radio communications (half-duplex) are used. The same radio frequency is used for sending and receiving (transceiver).

54p muathu_102 28-01-2013 72 6   Download

We have looked at confidentiality services, and also examined the information theoretic framework for security.

33p muathu_102 28-01-2013 72 4   Download