Bảo mật hệ thống mạng part 2 ppsx
Bảo mật hệ thống mạng part 2 ppsx
... employee, he may have access to rooms or offices that hold filing cabinets. Desk file draw
-
Figure 2- 2.
Eavesdropping
B
ad things can happen to an organization’s information or computer systems in
many ... of through the front door.
Chapter 1: What Is Information Security?
13
CHAPTER
2
Types of Attacks
15
Copyright 20 01 The McGraw-Hill Companies, Inc. Click Here for Terms of Use.
This...
Bảo mật hệ thống mạng part 5 ppsx
... CHAPTER
3
Information
Security Services
27
Copyright 20 01 The McGraw-Hill Companies, Inc. Click Here for Terms of Use.
CDs, and so on). Second, ... the copies to interested parties makes it
difficult to successfully change all of the documents at the same time.
Chapter 3: Information Security Services
31
Figure 3 -2.
Encryption coupled with ... and au-
thentication must be used to determ...
Bảo mật hệ thống mạng part 6 ppsx
... or a network within the control of the organization. What if the file is to be
copied to other parties or organizations? In this case, it is clear that the access controls on a
single computer ... unauthorized change has been
made to the file. That mechanism is a digital signature (see Chapter 12 for more detail on
digital signatures). A digital signature on a file can identify if the file ....
Bảo mật hệ thống mạng part 44 ppsx
... to get the message to display the way you want it to.
29 2
Network Security: A Beginner’s Guide
Chapter 15: Unix Security Issues
28 9
#rusersd /2- 3 tli rpc/datagram_v,circuit_v wait root
/usr/lib/netsvc/rusers/rpc.rusersd ... files:
hosts.allow:
#Allow telnets from my internal network (10.1.1.x)
in.telnet: 10.1.1.0 /25 5 .25 5 .25 5.0
#Allow ftp from the world
in.ftpd: 0.0.0.0/0.0.0.0
host...
Bảo mật hệ thống mạng part 52 ppsx
... advisories
were about problems on Unix systems. It was not until 19 92 that a CERT advisory men
-
tioned Windows systems (CA- 92. 02) . This advisory was not about attacks against Win
-
dows systems ... large portions of the Internet. Has any Windows
virus done that? And just recently (late 20 00, early 20 01), the Ramen worm made an ap
-
pearance. This worm was capable of scanning target...
Bảo mật hệ thống mạng part 1 potx
... modeling eventually lead to United States Department of Defense
Standard 520 0 .28 , The Trusted Computing System Evaluation Criteria (TCSEC, also
Figure 1 -2.
Electronic signals bypass encryption
This ... Minimal Protection or Unrated
C1 Discretionary Security Protection
C2 Controlled Access Protection
B1 Labeled Security Protection
B2 Structured Protection
B3 Security Domains
A1 Verified D...
Bảo mật hệ thống mạng part ppt
... off-site
Information on
paper in the office
Mainframe
Figure 2- 1.
Places where access attacks can occur
CHAPTER
2
Types of Attacks
15
Copyright 20 01 The McGraw-Hill Companies, Inc. Click Here for Terms ... on a system or if the attacker is allowed
to connect her own system to the network (see Figure 2- 2). Sniffers can be configured
to capture any information that travels over the netw...
Bảo mật hệ thống mạng part 4 pps
... the electronic mail
system to verify the identity of the sender.
Chapter 2: Types of Attacks
25
Chapter 2: Types of Attacks
21
MODIFICATION ATTACKS
A modification attack is an attempt to modify ... just that it is much easier
to conduct a DoS attack in the electronic world.
Chapter 2: Types of Attacks
23
Information on Paper
Information that is physically stored on paper is subject t...
Bảo mật hệ thống mạng part 7 pps
... them, that action is allowed
under this law.
Access to Electronic Information (18 US Code 27 01)
18 US Code 27 01 prohibits unlawful access to stored communications but it also prohibits
preventing ... defines the crime as the intentional access of a computer
without authorization to do so. A second part of the statute adds that the individual
accessing the computer has to obtain informat...
Bảo mật hệ thống mạng part 8 ppt
... crime is an area of continued research and develop
-
ment. If you have specific questions about a particular statute, consult your organiza
-
tion’s general counsel or local law enforcement.
Chapter