System Security

Redi Apri Handoko | 11.37 | 0 comments
 System Security
  • The Security Problem
  • Program Threats
  • System and Network Threats
  • Cryptography as a Security Tool
  • User Authentication
  • Implementing Security Defenses
  • Firewalling to Protect Systems and Networks
  • Computer-Security Classifications
  • An Example: Windows XP
Objectives
  • To discuss security threats and attacks
  • To explain the fundamentals of encryption, authentication, and hashing
  • To examine the uses of cryptography in computing
  • To describe the various countermeasures to security attacks
The Security Problem
  • Security must consider external environment of the system, and protect the
    system resources
  • Intruders (crackers) attempt to breach security
  • Threat is potential security violation
  • Attack is attempt to breach security
  • Attack can be accidental or malicious
  • Easier to protect against accidental than malicious misuse
Security Violations
  1. Security Violations
  • Breach of confidentiality
  • Breach of integrity
  • Breach of availability
  • Theft of service
  • Denial of service
    2. Methods
  • Masquerading (breach authentication)
  • Replay attack  Message modification
  • Man-in-the-middle attack
  • Session hijacking
Standard Security Attacks
Security Measure Levels
  1. Security must occur at four levels to be effective
  • Physical
  • Human Avoid social engineering, phishing, dumpster diving
  • Operating System
  • Network
     2.Trojan Horse
  • Code segment that misuses its environment
  • Exploits mechanisms for allowing programs written by users to be executed by
    other users
  • Spyware, pop-up browser windows, covert channels
     3.Trap Door
  • Specific user identifier or password that circumvents normal security procedures
  • Could be included in a compiler
    4.Logic Bomb
  • Program that initiates a security incident under certain circumstances
    5.Stack and Buffer Overflow
  • Exploits a bug in a program (overflow either the stack or memory buffers)
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Posted by : Redi A.H ~ / Tutorial windows, SEO , Info gadget, Download game

Artikel System Security Di posting oleh Redi A.H pada 15 Des 2010. Terima kasih atas kunjungannya. Kritik dan saran dapat disampaikan via kontak atau komentar. Jika diperlukan Artikel ini bisa disebarluaskan melalui blog sobat, hanya mohon sebutkan sumbernya dengan tautan link aktif ke postingan ini. Terimakasih. Happy blogging!!!

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