Network security protects information and systems on a computer network from unauthorized access, use, disclosure, disruption, modification, inspection, recording or destruction. It is a subset of cyber security and information security that uses techniques and methods to secure networks, devices, programs and data. The three main types of security are information security, cyber security and network security, with network security focusing specifically on protecting the integrity of a network and preventing unauthorized access.

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2Ymca-306a
Information and Network Security
SECURITY
Prof. Neeraj Bhargava
Mrs. Shubha Chaturvedi
Department of Computer Science, School of Engineering & System Sciences
MDS University Ajmer, Rajasthan

2. • Every day huge information is created, stored
processed and communicated by using
computers, laptops, tablets, mobile phones
on network.
• Therefore there is a lot of risk involved.
People involved in managing a network
security have found a massive increase of
hacker and criminals creating malicious
threats that have been send into network
across the world.

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What is Security in General?
Security is about protection of assets/belongings
• Prevention
Take measures that prevent your assets from being
damaged (or stolen)
• Detection
Take measures so that you can detect when, how,
and by whom an asset has been damaged
• Reaction
Take measures so that you can recover your assets

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Real world example
• Prevention
– locks at doors, window bars, secure the walls
around the property, hire a guard
• Detection
– missing items, burglar alarms, closed circuit
TV
• Reaction
– attack on burglar, call the police, replace
stolen items, make an insurance claim

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Online Shopping Example
• Prevention
– Encrypt your order and card number, enforce
merchants to do some extra checks, using PIN
even for Internet transactions, don’t send
card number via Internet
• Detection
– An unauthorized transaction appears on your
credit card statement
• Reaction
– Complain, dispute, ask for a new card number,
– Or, pay and forget

6. TYPES OF SECURITY
Three types:
1. Information Security
2. Cyber Security
3. Network Security

7. INFORMATION SECURITY:
• It is the super set that contains cyber security and network
security.
• It is the measures taken to protect the information from
unauthorized access and use.
• It follows CIA triad .

8. CYBER SECURITY
• Cyber security is a subset of information
security which refers to a set of techniques
and methodologies used to protect integrity
of networks, devices, programs, and data
from damage, attack, or unauthorized access.
In simple terms, cyber security is the practice
of protecting internet-connected systems and
networks from digital attacks.

9. NETWORK SECURITY:
• Network security is a subset of cyber security which
protects the integrity of your network unauthorized
access.
• Network security is the act of protecting files and
directories in a network of computers against
misuse, hacking, and unauthorized access to the
system.
• Network security is any action an organization takes
to prevent malicious use or accidental damage to
the network's private data, its users, or their
devices. The goal of network security is to keep the
network running and safe for all legitimate users.

10. ASSIGNMENT
Q1. What is the objective of Network Security?
Q2.Explain the use of applying Network
Security?