Operating system security

Hệ điều hành là gì? Tổ chức hệ thống máy tính (Computer-System Organization) Kiến trúc hệ thống máy tính (Computer-System Architecture) Cấu trúc hệ điều hành (Operating-System Structure) Các hoạt động hệ điều hành (Operating-System Operations) Quản trị quá trình (Process Management) Quản trị bộ nhớ (Memory Management) Quản trị lưu trữ (Storage Management) Bảo vệ và an ninh (Protection and Security) Các hệ thống phân tán (Distributed Systems) Các hệ thống mục đích đặc biệt (Special-Purpose Systems) Môi trường tính toán (Computing Environments)...

40p nghiapro512 22-09-2012 169 38   Download

Hệ điều hành là gì? Tổ chức hệ thống máy tính (Computer-System Organization) Kiến trúc hệ thống máy tính (Computer-System Architecture) Cấu trúc hệ điều hành (Operating-System Structure) Các hoạt động hệ điều hành (Operating-System Operations) Quản trị quá trình (Process Management) Quản trị bộ nhớ (Memory Management) Quản trị lưu trữ (Storage Management) Bảo vệ và an ninh (Protection and Security) Các hệ thống phân tán (Distributed Systems) Các hệ thống mục đích đặc biệt (Special-Purpose Systems) Môi trường tính toán (Computing Environments)...

40p duytan7697 13-06-2013 86 16   Download

Lecture Operating System: Chapter 09 - Security presented The security environment, Basics of cryptography, User authentication, Attacks from inside the system, Attacks from outside the system, Protection mechanisms, Trusted systems.

56p talata_1 22-09-2014 91 8   Download

Lecture Operating System: Chapter 10 - Unix and Linux presented History of unix, Overview of unix, Processes in unix, Memory management in unix, Input/output in unix, The unix file system, Security in unix.

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Lecture Operating System: Chapter 11 - Windows 2000 presented History of windows 2000, Programming windows 2000, System structure, Processes and threads in windows 2000, Memory management, Input/output in windows 2000, the windows 2000 file system, Security in windows 2000, Caching in windows 2000.

46p talata_1 22-09-2014 75 7   Download

Bài giảng "Bảo mật cơ sở dữ liệu: Security models" trình bày các nội dung: Access control, types of Access control, mandatory access control, rules based access control, authentication methods, operating system authentication,... Mời các bạn cùng tham khảo.

141p thangnamvoiva20 20-09-2016 82 6   Download

Lecture Security+ Certification: Chapter 9 - System hardening. The main contents of this chapter include all of the following: Disable nonessential systems, harden operating systems, harden applications, harden networks.

39p nhanmotchut_3 20-10-2016 75 5   Download

In this chapter, the following content will be discussed: What operating systems do, computer-system organization, computer-system architecture, operating-system structure, operating-system operations, process management, memory management, storage management, protection and security, kernel data structures, computing environments, open-source operating systems

58p dien_vi02 07-10-2018 42 2   Download

Report "Accounting information system: E-Commerce business and accounting problems in E-commerce" has present the content: overview E-commerce and Accounting Information System (AIS); problems with accounting information systems at enterprises; information security; ensure that electronic systems for transmitting, receiving, and processing customer order information operate efficiently and provide accurate information;...

16p minhlong26052001 08-08-2022 19 8   Download

Architecture of an ISO/IEC 17025 Quality Management System (QMS) for IT Security

Evaluation Labs: RASIC and Processes, General structure of the QMS documentation, Setting-up, Operating and Maintaining the QMS.

Reference: IoT security standards

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An integrated collection of tools for network monitoring and control. Single operator interface Minimal amount of separate equipment. Software and network communications capability built into the existing equipment SNMP key elements: Management station Managament agent Management information base Network Management protocol Get, Set and Notify

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Users and Security Security domain The database administrator defines the names of the users who are allowed to access a database. A security domain defines the settings that apply to the user. Authentication mechanism A user who requires access to the database can be authenticated by one of the following: Data dictionary Operating system Network The means of authentication is specified at the time the user is defined in the database and can be altered later. This lesson covers authentication by database and by operating system only.

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We now begin our look at building protocols using the basic tools that we have discussed. The discussion in this lecture will focus on issues of key establishment and the associated notion of authentication These protocols are not real, but instead are meant to serve just as a high-level survey Later lectures will go into specific protocols and will uncover practical challenges faced when implementing these protocols

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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 enough. Prove that for n greater 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 himself, haggard, jumpy, biting his lip. Daniel Webster said to him, "Well, how did you do at my task? Did you prove the theorem?' "Eh? No . . . no, I haven't...

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Protect web content from those who don’t have a “need to know” Require users to authenticate using a userid/password before they are allowed access to certain URLs HTTP/1.1 requires that when a user makes a request for a protected resource the server responds with a authentication request header WWW-Authenticate contains enough pertinent information to carry out a “challenge-response” session between the user and the server

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Used to connect two private networks together via the Internet Used to connect remote users to a private network via the Internet This could be done by opening your firewall to the LAN networking protocols (NETBIOS, NFS NetWare, AppleTalk)) But… it would also make those protocols available to any one on the Internet and they could come into your LAN at will Effectively make the whole Internet your LAN Exposes all of your data Anyone can easily take advantage of vulnerabilities in your internal hosts No privacy Better solution is to use a VPN in conjunction with your firewall ...

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Biggest problem is figuring out who a piece of mail is really from Must use a higher level mechanism for trust or privacy Most SMTP clients use sendmail which has been a constant source of security problems for years

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You don’t have to know all of the details You do need to know your system What services it is providing What protocols are involved What vulnerabilities is has How to minimize the risks

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Security-Enhanced Linux (SELinux) is an implementation of mandatory access control using Linux Security Modules (LSM) in the Linux kernel, based on the principle of least privilege. It is not a Linux distribution, but rather a set of modifications that can be applied to Unix-like operating systems, such as Linux and BSD.

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Developed 1996 as a teaching tool Santa Clara University\ Prof. Edward Schaefer Takes an 8-bit block plaintext, a 10 –bit key and produces an 8-bit block of ciphertext Decryption takes the 8-bit block of ciphertext, the same 10-bit key and produces the original 8-bit block of plaintext

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