SlideShare a Scribd company logo
1.
Method to provide
protection
System access control
Data access control
System Security Adsminnistration
System Design
Components of computer security
▰ Confidentiality
▰ Integrity
▰ Authentication
▰ Access control
▰ Non-repudiation
▰ Availability
▰ Privacy
▰ Stenography &
▰ Cryptography
2
Source of Attack
Downloading Programs
Cracked Software
E-mail Attachments
Internet
Booting from unknown CD/DVD
3
Virus
Vital Information
Resources Under Siege.
1st: Creeper, 1971
Malware
▰ Computer Viruses or
perverse softwares are
small programs that
can negatively affect
the computer
4
Types of Virus
▰ Residents Virus
▰ Direct Action Virus
▰ Overwrite Virus
▰ Boot Sector Virus
▰ Macro Virus
▰ File System Virus
▰ Polymorphic Virus
▰ FAT Virus
▰ Multiparticle Virus
5
Secure System
6
Two Step
Verification
3
Strong
Password.
2
Access
Control
1
Effect of Virues
▰ Slow Down
▰ Booting Time
▰ Monitor your data
▰ Affect network
▰ Alter pc settings
▰ Decrease partitions
▰ Destroy data etc.
7
8
Others
Worms
Spread to other
computer.
Bagle, I love you,
Morris, Numda
Trojan
Apears to perform a
desirable function but
instead facilitate
unauthorised access
to the user’s
computer system
Beast, Sub7.Zeus,
Zero Access Rootkit
etc.
Spyware
Installed in your pc to
spy on the system
owner’s activity
Coolweb search,
FinFisher, Zango, Zlob
Trojan, Keyloggers
9
Other Threats
10
▰ Spoofing
▰ Hacking
▰ Cracking
▰ Phishing
▰ Spam
▰ Adware
▰ Rootkit
▰ Salami
technique
Is there any solution?
1. Antivirus
2. Digital Certificate
3. Digital Signature
4. Firewall
5. Password
6. File Access Permission
11
DARK WEB
12
Hackers from abroad
13
14
THANKS!
Any questions?
You can find me at
▰ Jubayer.Kabir@northsouth.edu
▰ WhatsApp: 01778557844

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