1. NETWORK SECURITY

2. Define Network:
A Network is a series of points or nodes interconnected by communication paths.
Interconnect with other networks and contain sub networks.

3. 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.

4. 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.

5. Objective: Access Confidentiality Authentication Integrity
Non‐repudiation

6. 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.

7. Types: Physical security Perimeter protection
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

8. Working: We need multiple layers of security
Network security is accomplished through hardware and software.
Network security components:
Anti-virus and anti-spyware
Firewall
Intrusion prevention systems
Virtual Private Networks

9. Security tools: Antivirus software packages
Secure network infrastructure
DNS hardware and software
Virtual private network
Identity services
Encryption
Security management

10. Network security technology :
Different mechanisms to deal with these attacks.
Cryptographic systems:
plaintext is converted in to cipher text.
Secret Key Cryptography (SKC)

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

12. Firewall: A typical border control mechanism.
Metaphor for network security.
Designed to prevent unauthorized access to or from a private network.

13. 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.

14. 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.

15. WIRELESS NETWORK SECURITY
prevention of unauthorized access using wireless networks.
Security Policies:
Wireless Intrusion Prevention System(WIPS)
Wireless Intrusion Detection System (WIDS)
Implementation:
Three components: sensor, server, and console.

16. It is a short program aiming at securing communication over a network.
SECURITY PROTOCOLS:
It is a short program aiming at securing communication over a network.
Example:
Transport layer security (TLS)
PPP / Point-to-Point Protocol
Internet Protocols security (IPSec)

17. IMPLEMENTATION:
Network Security Services (NSS) comprises a set of libraries
It develops security-enabled client and server applications.
Some are:
Mozilla client products, including Firefox etc
Google Chrome
Sun server products

18. 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.

19. 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.

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

21. By ,
RAJAN SHUKLA