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5 Tips on password security

Whether it’s one PC or hundreds on a network, there’s only one thing that can separate your system from being compromised: a great password.

Why? Hackers want access to anything and everything. If they can guess your user name and password, you might as well have given them your wallet and the keys to your building.

Here is a list of five things to know and practice in using passwords.

1. Don’t be too comfortable with your passwords: Attacks can and do happen.

Hackers will stop at nothing to get into your network and files. They use three different methods to get to you: brute force, dictionary attacks and social engineering.

Brute force is the most time-consuming method. Basically, it involves a program that tries every combination of letters, numbers and keyboard characters to guess your password. It starts with trying every character, and then tries two-character combinations and so on.

The longer the password is, the exponentially more difficult it becomes to crack. A password that is eight characters in length and utilizes lower- and upper-case letters, numbers and keyboard characters won’t be cracked for two years. This underscores the importance of being as random as possible when choosing your password.

Another method of attack is through the use of custom dictionaries. These dictionaries are filled with words and names, but also number and letter combinations, such as 11111 and abc123. Simple passwords such as “duke” or “ilovemydog” can easily be guessed.

The third and most effective method of attack is social engineering. This involves someone with criminal intent soliciting a password directly from a user. Many people give up their passwords to co-workers and strangers without even realizing it.

For example, some small businesses don’t have a dedicated information-technology staff. A hacker posing as someone from your company’s Internet service provider could call in and get an unsuspecting employee’s password by “testing the service.” The hacker might request the employee’s user name and password to log in and test the connection from the ISP’s end. If the hacker sounds authoritative and legitimate enough, your whole network could be compromised.

2. Know what makes for a bad password.

Because the attacks described above are becoming increasingly more common, you don’t want to use anything in your password that’s personal and easy to guess. Keep in mind the following don’ts:
-Don’t use only letters or only numbers.
-Don’t use names of spouses, children, girlfriends/boyfriends or pets.
-Don’t use phone numbers, Social Security numbers or birthdates, license plates.
-Don’t use the same word as your log-in, or any variation of it.
-Don’t use any word that can be found in the dictionary — even foreign words.
-Don’t use passwords with double letters or numbers.

Some of the worst passwords are: password, drowssap (password spell backwards if you didn’t catch that), admin, 123456, and the name of your company or department. Finally, never leave it blank. That’s a surefire way to let the bad guys into your system.

3. Get proficient at creating good passwords.

A good password is one that is easy to remember but difficult to guess. That sounds hard to do, but it’s really not.

There are a couple of different ways to create difficult-to-crack passwords. One is substituting letters with characters and numbers. To make it easier on yourself, try to use numbers and characters that resemble the letters they are replacing.

For example, you would never want to use the word “password” as your password. If you change it to p@7sw0rd!, you’ve got something that would take some time to crack but is fairly simple to remember.

Another method is to use the first letters of the words in a favorite line of poetry or a verse of song. “took an oath and I’m gonna stick it out to the end” becomes “ta0aIg5io2te.” That’s a long one I know, but you get the idea.

The best passwords are at least eight characters in length and use a combination of numbers, keyboard characters and upper- and lower-case letters. The longer your password is, the longer it will take someone (or more likely, some program) to crack it.

Here are some excellent password generators I found on the web.
http://www.pctools.com/guides/password/
www.randpass.com

4. By all means, safeguard your password.

At first, it may be difficult to remember your password. Did you substitute an “i” with a “1” or did you use a “1” to represent “L?” Most people will want to write the password on a piece of paper and place it underneath their keyboard or mouse pad. Or worse, they’ll stick the password right on their monitor.

To help remember the password, use it immediately. Then log in and out several times the first day. Just don’t change it on a Friday or right before leaving for vacation. You could write it out several times on a piece of paper. This helps record it in your mind. Just be sure to shred the paper when done.

5. Change your password often

Your network administrator can force your employees to change their password every so often. By default, passwords are set to expire every 42 days in Windows Server 2003. Microsoft recommends having users change their passwords every 30 to 90 days, but encourages you to go with the smaller number.

I encourage you to change your passwords to personal web sites as well — such as to banking, Internet e-mail accounts, shopping sites, and so on. Do not use the same password for all of your sites. A particularly good hacker can cause personal financial ruin by gaining access to one username and password.

When you have several passwords to keep up with it can be hard, I know. I think I have about 15 that I use and they are all in my head. There are programs out there on the web like Account Logon (www.accountlogon.com; $24.95) and Roboform (www.roboform.com; $29.99) but two things about them detract. They cost money, and they will make your forget your passwords and the minute you are out of state on a friend or relatives pc and you want to check you web mail you will be stuck wondering what your password is.

If you have as many as I do and you cant remember them all, write them down on a business card and put it in your wallet or purse. Maybe even in your cell phone notes as well.

Hope this helps, now change those passwords.

(For Microsoft Windows users press ctrl alt del to get your security dialogue window while logged in, press change password button.)





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