The Ten Commandments of PC Security

Fortunately, archeologists have recently unearthed two stone tablets from a garage near Cupertino, California that can help deliver us from such evils. We present their guidelines here, along with interpretations from our brothers and sisters in the PC security choir.

I. Remember thy antivirus software and keep it updated. It's not enough to have the software installed (if you don't have an antivirus package, stop reading right now and get one); you also need to keep up with new viruses as they emerge. "Your antivirus software is only as good as your latest virus definitions set," says Kelly Martin, senior product manager for Symantec's Norton AntiVirus. Programs like Symantec's Norton AntiVirus ($50) and Network Associates' McAfee VirusScan ($35 to $60) can automatically update their virus signature databases, but it costs an additional $20 to $35 for ongoing annual subscriptions.

II. Thou shalt not covet thy neighbor's attachments. You get a message you think is from a friend with what looks like a cool file attached, so you click on it. Next thing you know, you're Typhoid Mary, spewing out infected e-mails to everyone in your address book. That's how the Sobig.F worm spread--and it happened so quickly that millions of copies got out before the antivirus companies could update their databases.

"Never trust an e-mail 'from' address," adds Chris Wysopal, director of research for security consultants @Stake. "And never open an attachment without verifying it was sent by a trusted person, and they meant to send it to you."

III. Avoideth bogus file downloads. Be wary of any Web site that requires you to download software to view a page, unless it's something familiar like a Flash plug-in or Acrobat Reader. The file may contain a virus, a Trojan horse, or some auto-dialer that calls pay-per-minute numbers via your modem and racks up huge charges.

"Do not install software via the Web unless you are absolutely sure what it is and that you trust the company you are downloading it from," warns @Stake's Wysopal.

IV. Smite spyware and pop-ups. Like Trojan horse programs, spyware secretly installs itself when you download software like file-swapping applications; it tracks your movements online and delivers ads based on where you surf. Pop-up ads can also exploit security flaws in Internet Explorer, like the recent Qhost Trojan that hijacked users' browsers after they viewed an ad on the Fortune City Web site. Fortunately, there are tools that can protect you: For example, Ad-aware (free) blocks spyware and StopZilla ($30) takes care of pop-up ads. Some antivirus software and security suites also stop spyware and pop-ups in their tracks.

V. Thou shalt foil spammers. Unsolicited commercial e-mail is more than just a nuisance; it's also a major source of virus infections. In fact, some versions of Sobig are designed to turn infected PCs into zombie machines that can be used to send spam. A good filter like Symantec's Norton AntiSpam 2004 ($40), Network Associates' McAfee SpamKiller 5 ($40 to $50), or Sunbelt Software's IHateSpam ($20) help trap the nasties your antivirus software might miss.

VI. Keep thy operating system patched. E-mail-borne worms and other scourges like to exploit security holes in your software--namely Windows and other Microsoft programs. These days Microsoft issues so many critical updates to fix these flaws that many users ignore them. Don't. Last January, the Slammer worm exploited a vulnerability that Microsoft had fixed more than six months before. But thousands of infected computers--including some at Microsoft--didn't have the patch installed. Run the Windows Update program once a week and whenever Microsoft issues a warning.

"Until we see automated patch management software, users will simply have to stay up to date," says Thor Larholm, senior security researcher at PivX Solutions.

VII. Maketh a rescue disk and keep it handy. When things go bad, a boot or rescue disk is your first step to recovery. At minimum, you'll want to put the basic elements of your operating system on a floppy disk or Zip media, so you can bypass the hard disk at start-up. To find out how, read "Hardware Tips: Create Your Own Emergency Boot Disk." A better idea: Use your antivirus program to create a rescue disk you can use when your system gets infected. Label it with a date and store it near your system where you won't lose it.

VIII. Be not taken in by false claims. There are more hoaxers than hackers on the Internet, and more bogus "e-mail virus alerts" than actual viruses. Even real virus threats are typically blown out of proportion by the media. A phony warning could cause you to delete harmless files and then forward the message to others, clogging e-mail servers and causing virus-like damage in the process. When you get one of these e-mails (or see yet another breathless news story), check it out first. Type the name of the alleged virus into a search engine to see if any of the major security vendors have issued an alert, and visit the virus hoax pages at F-Secure and Hoaxbusters.

IX. Honor thy firewall. A firewall is like a bouncer for your computer--it checks every ID at the door and won't let anything in or out until you give the thumbs up. So a hacker can't access personal information on your hard drive, and a Trojan horse keystroke logger (a stealth program that monitors the characters you type) can't steal your passwords and transmit them over the Net. Symantec and Network Associates both offer personal firewall packages for $35 to $50, while Zone Labs offers a no-frills version of its ZoneAlarm software firewall for free. But a better deal is an Internet security suite that combines antivirus, firewall, ad blockers, spam fighting, and other useful apps; most cost between $60 to $80. For a review of suites from Symantec and Network Associates, read "Extra-Suite Virus and Spam Protection."

X. Maketh backups and keep them holy. Simply put: Back up your data files at least weekly (daily if you're running a business). Even if you fall victim to a virus or hacker attack, you'll escape with only minor damage. Fail to keep a recent backup though, and you'll go straight to hell--at least, that's how it will feel.

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How to lock down sensitive data on your laptop

If you keep valuable files on your laptop, you probably know that you ought to protect your data. But knowing you should do something isn't the same as actually doing it, as evidenced by the steady stream of incidents where sensitive information gets lost or stolen from corporate laptops. However, locking down data isn't hard or expensive. We show you how.

The tasks of installing and running encryption software have not always been easy. But encryption is now simpler than it has ever been, with tools such as Steganos Safe Professional 2007 and Bullguard Backup making encryption a simple, but central, part of PC security.

I tried PGP Whole Disk Encryption 9.6 (£95) and SecurStar DriveCrypt Plus Pack (€148.75 inc VAT - that's about £105). Both applications can encrypt single files, batches of documents, or the entire hard drive and everything on it.

This last feature makes the most sense. You enter your password only once per Windows session, and everything gets encrypted automatically as you work.

Files are encrypted only while on the hard drive. If you send an email attachment to someone from your encrypted hard drive, the software automatically decrypts the attachment before it leaves the PC, and the recipient receives a normal, unscrambled message.

Full disk encryption tools used to have one major drawback - they slowed PCs considerably. But as processor power has gone up, software makers have optimised their products so effectively that you can barely tell the encryption is happening.

We surfed the web, checked and sent email, and even played some graphically intensive games on the encrypted laptop without encountering a perceptible performance hit from the encryption software, which quietly went about its business in the background.

With tools like these available, you have to wonder how many laptops full of sensitive information must be stolen from the car trunks and airport lounges of the world before their owners do something to protect that data.

Self-Defending Networks: The Next Generation of Network Security

Protect your network with self-regulating network security solutions that combat both internal and external threats.Provides an overview of the security components used to design proactive network security Helps network security professionals understand what the latest tools and techniques can do and how they interact Presents detailed information on how to use integrated management to increase security. Includes a design guide with step-by-step implementation instructions

Self-Defending Networks: The Next Generation of Network Security helps networking professionals understand how to deploy an end-to-end, integrated network security solution. It presents a clear view of the various components that can be used throughout the network to not only monitor traffic but to allow the network itself to become more proactive in preventing and mitigating network attacks. This security primer provides unique insight into the entire range of Cisco security solutions, showing what each element is capable of doing and how all of the pieces work together to form an end-to-end Self-Defending Network.

While other books tend to focus on individual security components, providing in-depth configuration guidelines for various devices and technologies, Self-Defending Networks instead presents a high-level overview of the entire range of technologies and techniques that comprise the latest thinking in proactive network security defenses. This book arms network security professionals with the latest information on the comprehensive suite of Cisco security tools and techniques. Network Admission Control, Network Infection Containment, Dynamic Attack Mitigation, DDoS Mitigation, Host Intrusion Prevention, and Integrated Security Management are all covered, providing the most complete overview of various security systems. It focuses on leveraging integrated management, rather than including a device-by-device manual to implement self-defending networks.

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Why Internet Security Software?

We would never go on vacation and leave the door to our home unlocked and open. Yet many people leave an open door to their computer where harmful viruses, malicious spyware and Internet predators can come in uninvited. These threats not only jeopardize our computers, but also our personal information and families.

Internet security suites integrate antivirus, firewall and antispyware software, parental controls and other protective features to:

• Protect your personal information

  Crooks are using technology and becoming more creative to steal your personal information. A security suite has a firewall, to guard sensitive data, antispyware software and anti–phishing protection.

• Protect your computer

  Viruses can render your computer useless. Antivirus software continually screens your computer, email attachments and other files.

• Protect your family

  Parental controls keep your children out of reach of online predators and filter unacceptable web content.

In this site, you’ll find articles on Internet security, news stories and comprehensive reviews on Internet security suites that will help you make an informed decision on which software is right for you.