internet related security (2)

8/13/2019 Internet Related Security (2)

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WHAT IS INTERNET ?

The Internetis a global system of interconnected computernetworksthat use the standard Internet ProtocolSuite(TCP/IP) to serve billions of users worldwide.

It is a network of networksthat consists of millions ofprivate, public, academic, business, and government

networks, of local to global scope, that are linked by a broadarray of electronic, wireless and optical networkingtechnologies.

The Internet can also be defined as a worldwideinterconnection of computers and computer networks thatfacilitate the sharing or exchange of informationamong users.

The Internet carries a vast range of informationresources andservices, such as the inter-linked hypertextdocuments oftheWorld Wide Web(WWW) and the infrastructure tosupport electronic m
http://en.wikipedia.org/wiki/Computer_networkhttp://en.wikipedia.org/wiki/Computer_networkhttp://en.wikipedia.org/wiki/Internet_Protocol_Suitehttp://en.wikipedia.org/wiki/Internet_Protocol_Suitehttp://en.wikipedia.org/wiki/Informationhttp://en.wikipedia.org/wiki/Userhttp://en.wikipedia.org/wiki/Informationhttp://en.wikipedia.org/wiki/Hypertexthttp://en.wikipedia.org/wiki/World_Wide_Webhttp://en.wikipedia.org/wiki/Electronic_mailhttp://en.wikipedia.org/wiki/Electronic_mailhttp://en.wikipedia.org/wiki/World_Wide_Webhttp://en.wikipedia.org/wiki/Hypertexthttp://en.wikipedia.org/wiki/Informationhttp://en.wikipedia.org/wiki/Userhttp://en.wikipedia.org/wiki/Informationhttp://en.wikipedia.org/wiki/Internet_Protocol_Suitehttp://en.wikipedia.org/wiki/Internet_Protocol_Suitehttp://en.wikipedia.org/wiki/Computer_networkhttp://en.wikipedia.org/wiki/Computer_network


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Internet Security?

Spoofing

Replay Attack


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What do we Need to Protect?

To Secure Data: Information we keep on computers (product

design, financial records, personnel data)

Lost time, lost sales, lost confidence

Resources Unauthorized use of computer time & space

Reputation Misrepresentation, forgery, negative publicity


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Fundamental Security

Objectives

Four fundamental objectives of Info Security

Confidentiality- Protection from unauthorizedpersons

Integrity- consistency of data; no unauthorizedcreation, alteration or destruction

Availability- ensuring access to legitimate users Legitimate use- ensuring appropriate use by

authorized users


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Who is vulnerable?

Financial institutions and banks Internet service providers

Pharmaceutical companies Government and defense agencies Contractors to various government

agencies Multinational corporations ANYONE ON THE NETWORK


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Adware

Cookies

Phishing Spyware

Hackers

BASIC SECURITY ATTACKS:


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ADWARES

Installed with Good Programs

Hotbar

Kazaa

Weatherbug

ITS EFFECTS:

Often hijacks your home page.

Continuous popups

Slower computer processing, takes the

computer longerto process or startup.


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INTERNET COOKIES

Short pieces of data used by web servers to help identifyweb users

Helpful on shopping sites

ITS EFFECTS: Identifies your IP address during your visit

CAN SEE WHAT WEB PAGES YOU VISIT, HOW OFTEN,AND HOW LON

Identifies your IP address during your visit


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Phishing

Sending people e-mail messages in order tolure them into divulging sensitive data

The data sought is commonly passwordsand credit-card details

The sender commonly assumes a relativelyhighly trusted identity e.g. a finl institution

The data is commonly keyed into a web-form

on a site that purports to be operated by thetrusted identity


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What isSpyware?

The Spyware is defined as software that aidsin gathering information about a person ororganization without their knowledge, and

that may send that information to anotherentity without user consent Spyware guru Steve Gibson considers it to

be anything that surreptitiously utilizes acomputers Internet back channel tocommunicate with an external server


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VIRUS SPYWARE

Damages data Steals sensitive privateinformation.

Written by hackers Written by professional onlinecriminals.

Infection is obvious and can bedetected with anti-virus software.

Infection is silent and cannot bydetected with anti-virus software.

Most computer users are sufficientlyprotected.

Very few computer users areprotected

The threat is decreasing. The threat is increasing.

SPYWARE AND VIRUS


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Trojan HorsesSpyware that is often disguised as harmless or even desirableprograms, but is actually designed to cause loss or theft of computer data and todestroy computer systems. They usually arrive as email attachments or bundled

with other software . Somegive attackers unrestricted access to your computeranytimeyoure online, allowing file transfers , adding or deleting of files and

programs, and taking control of your mouse and keyboard.

VirusA software program written to disrupt computer systems and to destroydataviruses are the most well known Internet security threat.

WormsSimilar to viruses but much more dangerous. They spread rapidly by

accessing your email address book and automatically forwarding themselves toevery address it contains. Current anti-virus software cant find worms oncetheyve been loaded ontoyour system.

Web filteringA software tool that allows computer users to determine whichWeb content they will allow onto your computer through their browser.

DIFFERENT TYPES OF SPYWARE :


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SECURITY COUNTERMEASURES

THREE PHASE APPROACH

PROTECTION

DETECTION

RESPONSEIR


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Different types of Countermeasures for Security

FIREWALL

SPY SWEEPER

Ad-AWARE

NORTON ANTI SECURITY VIRUS

COUNTER SPY


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What is a Firewall?

A firewall is hardware, software, or acombination of both that is used to

prevent unauthorized programs orInternet users from accessing a privatenetwork and/or a single computer


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How does a firewall work?

Inspects each individual packet of dataas it arrives at either side of the firewall

Inbound to or outbound from yourcomputer

Determines whether it should be allowedto pass through or if it should be blocked


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Firewall

Visible

IP

Address

Internal

Network

PC Servers

Host

A system or group of systems that enforces an access control policy between twonetworks.

Firewall

Router


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TYPES:Spyware/Adware

ADVANTAGES:

Has immunity that blocks known Spyware/Adware

User friendly

DISADVANTAGES:

Costly($29) Takes a while to scan .

SPY SWEEPER


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AD-AWARE 6.0

TYPES:Adware

ADVANTAGE:

EASY TO USE SCANNING . User friendly.

DISADVANTAGES:

Costly($39) It was built to detect Adware

so its lacks ability to detect Spyware


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NORTON SYSTEMATIC ANTI VIRUS

TYPES:

Virus,Adware,Spyware.

ADVANTAGE:

Can detect viruses , hacking programs,

spyware programs and adware programs.

Comes with Firewall.

DISADVANTAGES:

Costly($69).

Very confusing to use .


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THANK YOUPRESENTED BY:

SARVESH TRIVEDI- 45

SHWETA TRIPATHI-44

TRISHALA SHAH-

SNIGDHA

internet related security (2)

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