Upload
-
View
229
Download
0
Embed Size (px)
Citation preview
8/9/2019 http://www.softxgame.com
1/17
8/9/2019 http://www.softxgame.com
2/17
343
1
3
2
4-5-67-8-9-10
11 312-13-14 415-16 5
2
8/9/2019 http://www.softxgame.com
3/17
8/9/2019 http://www.softxgame.com
4/17
.
.
.
: ()
. .
.
. ) DoS (
) DDoS . ( .
) DDoS. (
.
: .
.
.
.
.
..
.
( Classic Virus
:
4
8/9/2019 http://www.softxgame.com
5/17
1(File Viruses: ) (
Disinfect , Cure , Repair ,etc ( Mabezat.Sality
(Duplicate Files ) 75 %
( Temp.exe.
% , (SystemRoot%, %Temp% ,%userprofile%,etc %systemdrive,%
: (1(Boot sector viruses .
. . 32
Cd
- MS Worde -MS Exel 2(Macro viruses .Power Point
. .
.
3(Script Viruses, , , ) Php(..., ,
.
(Trojan: 1(Backdoors .
RAT = RemoteAdministrator Tool
TCP\IP
:
.
(.... )
General Trojans
PSW Trojans
. )
(
5
8/9/2019 http://www.softxgame.com
6/17
( ) ( )
Trojan Clickers
DOS Attack
.
. Trojan Downloaders )
) .) 100 (
5 Trojan Droppers
( (
.
:
Trojan Proxies
.
. Trojan Spies ) PSW
Trojans (
Trojan Notifiers IP.
.BackdoorsPSW Trojans Rootkits
.ArcBombs
.
:
5 200
:6
8/9/2019 http://www.softxgame.com
7/17
.
. ) ) .
:)Phishing () Phishing (
.
. Phishing
.
: .
. .
:
.
) Firewall(:
.
. .
-/ 2)Service Pack2) (MacOS X. (
:
) Firewall ( .
.
7
8/9/2019 http://www.softxgame.com
8/17
.
.
.
. .
.
. ) MacOS .(
) McAfee) (Norton Antivirus () Symantic) (Cisco System) (Microsoft.(
:
. .
.
: . .
. . .
.
: .
) OK () Accept . (
) X. (
: .
8
8/9/2019 http://www.softxgame.com
9/17
.
.
:Packet Sniffers
.
:
.
.
: .
.
: . .
. .
: ) /
service pack2) (MacOSX) (Firewall.(
) antivirus ( : "Guard" "Defender "
.
9
8/9/2019 http://www.softxgame.com
10/17
.
) (Top Antivieus )Top Firewalls)
. .
) .Snapshot (
10
8/9/2019 http://www.softxgame.com
11/17
.
. . .
. . . "" .
.
. .
). WEP (64128
. ) WEP) . (WEP (
) WPA (.
) :Cryptography ( .
- - ) . Cryptanalysis( .
. .
)PGP . (
::
) : .Confidentiality (1.
( ( .Integrity: ( (2.
) :.Authentication (3.( )
4 .)Non-repudiation: (.
.
::
11
8/9/2019 http://www.softxgame.com
12/17
1. ) .Conventional Cryptography.(2. ) .Public Key Cryptography.(
:
") server (
)"Secure Sockets Layer SSL) [1.[
: :
. . .
:
. . ) Certification Authority:(
.
( ) : ) (
. ] .3 thwat] verysigncomodo.
) Registration Authority:(
] 3.[
):Certificate Repository (
] 3.[
:
. :
. :
12
8/9/2019 http://www.softxgame.com
13/17
. : . :: . . : ] : 2[
: :
. :
) (mail server web server) ( .
:
] 3.[
):X.509 (
) ITU) (format . (]. 3[
:
.
] 3. [
)):Authentication
) hash (
( )
. . .
)Confidentiality : (
)
) .
:) CA (
)public key . ( 13
8/9/2019 http://www.softxgame.com
14/17
):Certificate Policy (
] 3.[
:
) )hardware .
:
. .
.
:
) Authentication .(
.
:
.
:
].3 [
: 1. .comodo2. )
:
.
14
8/9/2019 http://www.softxgame.com
15/17
15
8/9/2019 http://www.softxgame.com
16/17
' Signature '
.
Digital Signature
Digital Certificate
:
.
: :
-1' Key Based Signature : ' ' '
. -2' Signature Biometric : '
.
:
( (
.
16
8/9/2019 http://www.softxgame.com
17/17
'Hash Function '
' ' ' ' ''
' '
' ' ' ' .
.
. ''
: .1- 2-
. .3- .4--5 )
.( .. -6
. 7
.
17