Bảo mật hệ thống mạng part 5 ppsx

... difficult. Makingmultiple copies of the information and distributing the copies to interested parties makes itdifficult to successfully change all of the documents at the same time.Chapter ... exists. For paper files, the physical paper file must be protected. Thephysical file must exist at a particular location; therefore, access to this location must becontrolled. The confidentiality ... or a network within the control of the organization. What if the file is to becopied to other parties or organizations? In this case, it is clear that the access controls on asingle computer...

Bảo mật hệ thống mạng part 2 ppsx

... individuals.Vulnerability ScanningScanning computer systems for vulnerabilities is an important part of a good securityprogram. Such scanning will help an organization to identify potential entry ... cannot be the all-encompassing solution.Anti-Virus SoftwareAnti-virus software is a necessary part of a good security program. If properly imple-mented and configured, it can reduce an organization’s ... information is found.EavesdroppingWhen someone listens in on a conversation that they are not a part of, that is eavesdrop-ping. To gain unauthorized access to information, an attacker must...

Bảo mật hệ thống mạng part 6 ppsx

... or a network within the control of the organization. What if the file is to becopied to other parties or organizations? In this case, it is clear that the access controls on asingle computer ... signature was created. In order to be worthwhile, the digital signature must beidentified with a particular user; thus, the integrity service must work with the identifica-tion and authentication ... facility. Handprint scanners are also often used to authenticate individuals whowish to enter certain parts of facilities. The authentication mechanism is directly tied tothe physical presence and...

Bảo mật hệ thống mạng part 44 ppsx

... files:hosts.allow:#Allow telnets from my internal network (10.1.1.x)in.telnet: 10.1.1.0/ 255 . 255 . 255 .0#Allow ftp from the worldin.ftpd: 0.0.0.0/0.0.0.0hosts.deny:#Deny telnets from anywhere ... address>/<network mask>CHAPTER 15 Unix Security Issues2 85 Copyright 2001 The McGraw-Hill Companies, Inc. Click Here for Terms of Use.Chapter 15: Unix Security Issues287Make sure that ... command is used as follows:umask 077294Network Security: A Beginner’s GuideChapter 15: Unix Security Issues2 95 The numbers after the command identify the permissions that will not be given to...

Bảo mật hệ thống mạng part 52 ppsx

... file (or a macro for that matter) allowsAppendix B: Unix vs. Windows: Which Is More Secure? 355 354 Network Security: A Beginner’s GuideThe debate about which operating system is more secure ... no-brainer. But where do we draw the line betweenoperating system and application? Is RPC part of Unix? Is Explorer part of Windows? Inmany cases, it is not so simple to separate out the application ... operating systems? Is the debate no longer UnixAppendix B: Unix vs. Windows: Which Is More Secure? 357 Both operating systems appear to be interactive these days. So if an attacker gains ac-cess,...

Bảo mật hệ thống mạng part 1 potx

... access would be denied.This concept of modeling eventually lead to United States Department of DefenseStandard 52 00.28, The Trusted Computing System Evaluation Criteria (TCSEC, alsoFigure 1-2.Electronic ... well as assur-ance requirements. Thus, in order for a system to meet the qualifications for a particularlevel of certification it had to meet the functional and the assurance requirements.The ... Chapter 1: What Is Information Security? 5 BRIEF HISTORY OF SECURITYHow we handle the security of information and other assets has evolved...

Bảo mật hệ thống mạng part ppt

... officeMainframeFigure 2-1.Places where access attacks can occurCHAPTER2Types of Attacks 15 Copyright 2001 The McGraw-Hill Companies, Inc. Click Here for Terms of Use.Bad things can happen ... information is found.EavesdroppingWhen someone listens in on a conversation that they are not a part of, that is eavesdrop-ping. To gain unauthorized access to information, an attacker must...

Bảo mật hệ thống mạng part 4 pps

... by the electronic mailsystem to verify the identity of the sender.Chapter 2: Types of Attacks 25 Chapter 2: Types of Attacks21MODIFICATION ATTACKSA modification attack is an attempt to modify...

Bảo mật hệ thống mạng part 7 pps

... specific questions about a particular statute, consult your organiza-tion’s general counsel or local law enforcement.Chapter 4: Legal Issues in Information Security 45 Figure 4-1.U.S. states ... defines the crime as the intentional access of a computerwithout authorization to do so. A second part of the statute adds that the individualaccessing the computer has to obtain information that ... sections discuss the statutes that are most often used. For the applicability ofthese statutes to a particular situation or organization, please consult your organization’sgeneral counsel.Computer...

Bảo mật hệ thống mạng part 8 ppt

... specific questions about a particular statute, consult your organiza-tion’s general counsel or local law enforcement.Chapter 4: Legal Issues in Information Security 45 Figure 4-1.U.S. states ... representatives of theforeign government (at an embassy or consulate) or by contacting the FBI. 50 Network Security: A Beginners‘s GuideState Specific Computer Crimes NotesWisconsin Offenses...

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