Network security involves protecting computer networks from unauthorized access and system threats. The document outlines the history and objectives of network security, as well as current and emerging types of network security technologies. These include encryption, firewalls, intrusion detection/prevention systems, and biometric authentication. The future of network security is envisioned to function more like the human immune system, adapting rapidly to new threats through advancements in security software, hardware, and policy.

1. NETWORK SECURITY
BY RAAZ KARKEE

2. OBJECTIVE
• What is network security?
• Types of network security?
• Network security technology?
• Current Developments?

3. CONTENTS
• Introduction
• Objective of Network security
• History
• Types
• Network security technology
• Wireless network security
• Current development
• Future development
• conclusion

4. NETWORK
• A Network is a series of points or nodes interconnected by
communication paths.
• Interconnect with other networks and contain
sub networks.

5. DEFINE SECURITY
• Security is “Freedom from risk or danger.“
• The ability of a system to protect information and system
resources with respect to confidentiality and integrity.

6. NETWORK SECURITY
• Any activities designed to protect your network .
• Target- variety of threats and stops them from entering or
spreading on your network.
• Handled by a network administrator.

7. OBJECTIVE
• Access
• Confidentiality
• Authentication
• Integrity
• Non‐repudiation

8. HISTORY
• During the 1980s, the hackers and crimes were beginning to
emerge.
• CERT was created to overcome network security issues.
• In the 1990s, Internet became public and the
• security concerns increased tremendously.

9. TYPES
• Five types of network security can aid in secure networking.
• Physical security
• Perimeter protection
• User training and education
• Wireless encryption protocol (WEP)
• MAC address filtering

10. SECURITY TOOLS
• Antivirus software packages
• Secure network infrastructure
• Virtual private network
• Encryption
• Security management

11. NETWORK SECURITY TECHNOLOGY
Different mechanisms to deal with these attacks.
Cryptographic systems:
plaintext is converted in to cipher text.
• Secret Key Cryptography (SKC)

12. Public Key Cryptography (PKC):
Hash Function:
Hash function
Plain text Cipher text

13. FIREWALL
• A typical border control mechanism.
• Metaphor for network security.
• Designed to prevent unauthorized access to or from a private network.

14. FIREWALL TYPES
• Packet Filtering Firewall
• State Full Firewall
• Application Aware Firewall etc..
Network-based IDs (NIDS):
The sensor are located at the choke in network
It monitored, it captures all the network traffic and analyze each packets for
malicious traffic

15. SECURE SOCKET LAYER (SSL):
• It is a good level of security between a web browser
and a website.
• There is a tunnel between them.
• Clients present a certificate to the server to
prove their identity.

16. WIRELESS NETWORK SECURITY
• prevention of unauthorized access using wireless networks.
Security Policies:
• Wireless Intrusion Prevention System(WIPS)
• Wireless Intrusion Detection System (WIDS)

17. CURRENT DEVELOPMENTS:
Hardware Developments
• Biometric systems -secure workstation logons
• Smart cards -undeniable proof of a user’s identity.
Software Developments
• Current research develops security software using neural
networks.
• Objective- use neural networks for the facial recognition software.

18. FUTURE TREND:
The network security will be able to function as an immune system.
The same set of security technology that is being used today with some
minor adjustments.

19. CONCLUSION
• The network security field evolve more rapidly to deal with the threats further in the future.
“As threats tweaks,
Security tremendously Tweaks”
Source: wikipedia