A Multi-Dimensional Approach to Internet Security ( Download Full Seminar Report )
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09-04-2009, 01:11 PM

Today, the World Wide Web is used for information, commerce, news, weather, music, telephony, audio and video conferencing, database access, file sharing, with new features cropping up almost daily. Each has its own security concerns and weaknesses. The frequency and sophistication of Internet attacks have increased. These changes in the Internet community and its security needs prompted the first bona fide defense measures. The network must be protected from outside attacks that could cause loss of information, breakdowns in network integrity, or breaches in security. As the Internet has matured, however, so have the threats to its safe use, and so must the security paradigms used to enable business use of the Internet. This paper summarizes a multi-dimensional approach (which is mandatory these days to discourage ever-more sophisticated threats to the network) to security in the present scenario as against a single-dimensional approach, which is no longer adequate, and very much a popular target to attack.

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19-10-2010, 02:39 PM

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Imagine the situation that you are sending a file to your friend, which contains sensitive data and is to be protected from disclosure. A third person gains unauthorized access to monitor the transmission and is able to modify the contents of the file. Consider another situation where instead of modifying the contents the third person constructs a new file and forwards it to your friend as if it had come from you. So neither your data remains protected nor will your friend get the correct data. It is not surprising to face such kind of problems, since as the network is growing day by day many such problems related to security of data are coming into picture.

So, there is a need of proper mechanism, which will ensure the security of data during its transmission over the network. There must be some authentication mechanism, which will take care that only the authorized party gets the access to the service. Kerberos is an attempt in this direction.

Kerberos is a trusted third-party authentication service based on the conventional encryption. It is trusted in the sense that both the clients and servers trust Kerberos to mediate their mutual authentication. In a more open environment, in which network connections to other machines are supported there is a requirement of the user to prove identity for each service invoked; also it requires that servers prove their identity to clients. This approach to security is supported by Kerberos.

This paper gives a brief introduction of security services and attacks followed by a detail discussion about Kerberos, the motivation behind Kerberos and how it has been implemented. It also presents the issues and problems which are yet to be solved in Kerberos.
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24-11-2010, 12:32 PM

This article is submitted by:
Court Nederveld
Internet Security
Protect your computer in 4 steps.

Step 1. Keep your firewall turned on
A firewall is a software program or piece of hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet.
A firewall helps protect your computer from hackers who might try to delete information, make your computer crash, or even steal personal information such as passwords or credit card numbers. You should make sure your firewall is always turned on.
if you have a small-office network, it is important to protect every computer. You should have a hardware firewall (such as a router)
How Firewalls Work
When someone on the Internet or on a network tries to connect to your computer, the attempt is called an "unsolicited request." When your computer gets an unsolicited request, Firewalls block the connection. If you run a program such as an instant messaging program or a multiplayer network game that needs to receive information from the Internet or a network, the firewall asks if you want to block or unblock (allow) the connection.
Step 2. Keep your operating system up-to-date
High priority updates are critical to the security and reliability of your computer. They offer the latest protection against malicious online activities. Microsoft provides new updates, as necessary, on the second Tuesday of the month.
Automatic Updates is the easiest, most reliable way to help protect your computer from the latest Internet threats by delivering security updates right to your computer automatically.
Step 3. Use updated antivirus software
Viruses are usually malicious software. You need antivirus technology to help prevent viruses, and you need to keep it regularly updated.
Here are a few primary indicators that your computer might be infected:
Your computer runs more slowly than normal
Your computer stops responding or locks up often
Your computer crashes and restarts every few minutes
Your computer restarts on its own and then fails to run normally
Applications on your computer don't work correctly
Disks or disk drives are inaccessible
You can't print correctly
You see unusual error messages
You see distorted menus and dialog boxes
Step 4. Use updated antispyware technology
Spyware is usually malicious software. You need antispyware technology to help prevent spyware, and you need to keep it regularly updated.
Spyware is a general term used to describe software that performs certain behaviors such as advertising, collecting personal information, or changing the configuration of your computer, generally without appropriately obtaining your consent first.
Internet Safety Guidelines
Recognize phishing scams and fake e-mails
Phishing is a type of deception designed to steal your valuable personal data, such as credit card numbers, passwords, account data, or other information.
Con artists might send millions of fraudulent e-mail messages that appear to come from Web sites you trust, like your bank or credit card company, and request that you provide personal information.

Internet Safety Guidelines
How to handle suspicious e-mail
If you think you've received a phishing e-mail message, do not respond to it.
Report suspicious e-mail to the faked or "spoofed" organization.
Contact the organization directly—not through the e-mail you received—and ask for confirmation. Or call the organization's toll-free number and speak to a customer service representative. Report the e-mail to the proper authorities, including the FBI, the Federal Trade Commission (FTC), and the Anti-Phishing Working Group. For more information on how to report phishing scams, read What to do if you've responded to a phishing scam.
Don't click links in e-mail messages.
Internet Safety Guidelines (continued)
If you need to update your account information or change your password, visit the Web site by using your personal bookmark or by typing the URL directly into your browser.
Check the security certificate before you enter personal or financial information into a Web site.
Links in phishing e-mail messages often take you to phony sites that encourage you to transmit personal or financial information to con artists. Avoid clicking a link in an e-mail message unless you are sure of the destination. Even if the address bar displays the correct Web address, don't risk being fooled. Con artists can display a fake URL in the address bar on your browser. Type addresses directly into your browser or use your personal bookmarks.
Make sure the site is secure before you type.

Anti-spam and anti-phishing technologies
Microsoft Phishing Filter

Use e-mail software that filters spam
Look at some of the key phrases used to get you to respond to a fake email.
Watch for Key Phishing Words
"Verify your account.“
"If you don't respond within 48 hours, your account will be closed.“
"Dear Valued Customer.“
"Click the link below to gain access to your account.“
Slightly modified URLs
micosoft.com mircosoft.com verify-microsoft.com
Protect your personal information
Create strong passwords
Make it lengthy
Combine letters, numbers, and symbols
Avoid your login name
Test your password at microsoftathome/security/privacy/password_checker.mspx
Use online payment services
Use a third-party payment service to pay for things online
Beyond the basics, how to protect yourself and your data.
ID theft
Social engineering is a way for criminals to gain access to your computer. The purpose of social engineering is usually to secretly install spyware or other malicious software or to trick you into handing over your passwords or other sensitive financial or personal information.

Use Strong Passwords
Recognize Spam and Phishing
Phishing” is a form of Internet fraud that aims to steal valuable information such as credit cards, social security numbers, user IDs and passwords
Refers to the stealing of personal identifiers such as Pin numbers, Credit card numbers and passwords via a spoof web site or email.
Unsolicited, unwanted, irrelevant, or inappropriate messages, especially commercial advertising in mass quantities
Spam also eats up a lot of network bandwidth
Mobile devices and wireless 5 safety tips for using a public computer
Don't save your logon information. Always log out of Web sites by clicking "log out" on the site. It's not enough to simply close the browser window or type in another address
Don't leave the computer unattended with sensitive information on the screen.
Erase your tracks
Here’s how

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