Internet security
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Internet Security. Sunil Ji Garg GM, Software, UPTEC. Living in a World Of Hackers, Crackers, Thieves & Terrorists. Railway Tickets Fraud. Increase in site visits but decrease in business. Digit Site Redirected Internet British Lottery Fraud. Fake NASA Examination

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Internet Security

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Internet security

Internet Security

Sunil Ji Garg

GM, Software, UPTEC

Living in a world of hackers crackers thieves terrorists

Living in a World Of Hackers, Crackers, Thieves & Terrorists

  • Railway Tickets Fraud.

  • Increase in site visits but decrease in business.

  • Digit Site Redirected

  • Internet British Lottery Fraud.

  • Fake NASA Examination

  • Indian IT Hub-Bangalore under attack.



  • It is not your computer when somebody else has a access to it.

  • It is not your server when it is serving someone you do not know.

  • Retaining a secret is possible only when the person you shared it with is in the heaven.

Sharing vs securing

Sharing Vs. Securing

  • SHARING is NOT inversely proportional to SECURING.



    Internetworking + Security

    = Win-Win Framework

Safe and secure inter networking

Safe and Secure Inter-networking

  • Safety relates to Confidentiality and Integrity of information.

  • Security relates to Authentication and Non-repudiation.


Devices are vulnerable

Devices are Vulnerable

  • Client Computers

    • OS Loopholes, Soft password schemes, friendliness needs, Application Bugs, Virus attacks

  • Servers

    • Weak Standards, Casual Administration, Bugs, Virus Attacks

  • Intermediate Devices

    • Distributed Administration, Varying Standards

Mediums are vulnerable

Mediums are Vulnerable

  • Wires

    • Fast, Moderately Secure, Economic

  • Fibres

    • Extemely Fast, Secure, Economic for bulk traffic

  • Wire-Less

    • Moderate Speed, Security Costs, Moderately priced, easy deployment

Protocols are vulnerable

Protocols are Vulnerable

  • TCP/IP (Spoofing Possible by changing Source-Destination Addresses at packet level).

  • DNS (Recursive Domain Name Look-up is possible is getting a map of IP addresses and the services each IP station is running).

  • Open TCP ports can be spidered.

  • Internet Control Message Protocol (ICMP) message types can be changed.

  • Network can be flooded with junk.

Security fundamentals

Security Fundamentals

  • Privacy Vs. Security.

  • What is to be protected?.

  • From whom it is to be protected?.

  • Motive of Intruders.

  • Threat Perception.

  • Security Methods.

  • Pre and Post-breach measures.

Privacy vs security

Privacy Vs. Security

  • Privacy : Ability to maintain selective anonymity

  • Security : Information Integrity, Uninterrupted service, Information Secrecy.

    Security Increase may increase privacy or it may be reduced it due to other impacts.

What is to be protected

What is to be protected?

  • Computer Information from being damaged.

  • Computer Information from illegitimate usage.

  • Computer Access Information from mis-usage (Password, Digital Ids, Account No., Credit Card Nos. etc.)

From whom it is to be protected

From Whom it is to be protected?

  • Deliberate Crackers/Hackers.

  • Money Makers of different varieties.

  • People who get allured with open locks.

  • Novice/Accidental error makers.

  • Middlemen.

  • Programmers/Administrators/Security verifiers.

  • Rule-Makers.

  • Previous Authorities.

Motive of intruders active passive

Motive of Intruders (Active/Passive)

  • Theft (Financially rewarding)

  • Spying (Positive or negative)

  • Misrepresentation.

  • Revenge.

  • Ignorance (being unaware of implications.)

  • Damage (Sadist)

  • Prank (Just for Fun)

  • Respect (By proving special skills)

  • Analysis (Long term commercial gain)

Threat perception

Threat Perception

  • Email : Primary Medium to Attack

  • Threat from Viruses (Programs that self-replicate to spread fast, damage information, hog resources or Deny service)

  • Spywares.

  • Impersonation.

  • Password Insecurity.

  • Sniffers (Programs that take information passively).

  • Alluring methods and Spams.

  • Data Modifiers.

Security methods

Security Methods

  • Cryptography

  • Audits (Logs, sniffs, watches, event records)

  • Barriers (Firewalls, Proxies, network segmentation)



  • Substitution & Transposition based on keys.

  • DES (Digital Encryption Standards).

  • Public/Private asymmetric-key methods .

  • RSA Algorithm.

  • One way Hashing.

  • Digital Signatures.

  • Certification Authorities (For authentic Public Keys: Certificates).

Digital signature authentication

Digital Signature Authentication

One Way Hash

Pvt. Key Encryption

Plain Message


Message Digest

Digital Signature

Create New MD

Message Digest

Plain Message


Compare Message Digests to Authenticate

Digital Signature

Message Digest

Decrypt With Public Key

Security audits

Security Audits

  • Sniffing

    • Hearing and recording Traffic for analysis

  • Logs

    • Recording Information headers

  • Watches

    • Put sniffers on specific traffic source/dest.

  • Event Recorders

    • Utilising OS features for analysis.

Security barriers

Security Barriers

  • Firewalls

    • Packet level traffic selection

    • Application level selection.

  • Proxies

    • Remote Hosts see only the proxy, traffic behind is proxied by it.

  • Network Segmentation

    • Permitting Type specific traffic in segmeted local areas.

Sharing security experience extract

Sharing/Security Experience Extract

  • Sharing wins customer delight.

  • Trust helps to make a secure design, Secure design brings more trust.

  • Most vulnerable security holes begin with human-beings.

  • Security is a continuous process.

  • Emergency measures for security breach shall be pre-planned.

Thank you


  • More questions/discussions invited.

  • Follow-up discussions via

    • Email: [email protected]

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