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2torial #0499:
Learn2 Choose and Use a Password

NOT your name spelled backwards...
Remember the fantasy stories of wizards and
genies with magic words that unlock treasure
troves? That's looking more and more like reality
these days, as increasing amounts of important
information are accessed with a single passsword.
Business networks, Automatic Teller Machines, home
security systems and Internet accounts are just a
few of the aspects of your identity that can be
easily assumed by anyone who knows the right keys
to push. And if you haven't chosen a password
wisely, you may find yourself usurped by someone
who's either persistent or mildly lucky, or both.

The task of this 2torial is to help you
formulate passwords that are easy for you to
remember and use, yet all but impossible for other
persons to guess or chance upon. Follow these steps
and rest assured that the magic word won't be on
anyone else's lips or fingertips.
Assess the task
Start by learning what your password cannot be.
Is there a minimum or maximum length? Is the system
case-sensitive (see Keywords)? Are special
characters allowed, or must it be limited to
numbers and letters?
- Consider the convenience factor. A
computer access code you enter several times a
day should probably not involve elaborate
keyboard gymnastics. On the other hand, a PIN
code (Personal Identification Number) for a cash
machine shouldn't be so simple that a casual
observer could discern the pattern.
- Another factor is the number of
applications of the password. It's not a
good idea to use the same password in multiple
circumstances; instead, build a "mental key
chain" of passwords that are thematically linked
in a manner known only to you (see Step
6). That means you'll need to start out with
a password that supports such linking.
Eliminate the obvious
Take a few minutes to think like a
password-cracker. If you were trying to break into
your account, what combinations would you try? The
ideal password is a word, term or phrase that's
personally meaningful and therefore memorable, but
so far removed from its original context as to
place it beyond the reach of the educated guesser.
- Avoid the bumper sticker syndrome.
The world is full of opportunities for us to
announce our interests and affinities: bumper
stickers, custom license plates, our online
names. Resist the temptation to make your
password a means of self-expression. If you're
an avid sailor, stay away from passwords like
port or starboard.
- On the other hand, there's nothing
wrong with a password that holds a particular
connotation for you, but the subject it evokes
shouldn't be one that others would associate
with you. Your co-workers (or anyone glancing on
the pictures in your cubicle) may know you as a
sailor, but chances are they don't know the name
of the boy who sat in front of you during
seventh grade math class.
Avoid the old standbys
Here are some of the most common password
categories around, and therefore likely to be
guessed:
- Common names, such as Jen or Gordon.
Also avoid using your middle name, your mother's
maiden name, or the name of your children.
- Obscenities, especially of the
four-letter variety. Most password crackers will
try them early on.
- Science fiction terms: Among the more
prevalent are "Data," "Spock," "Worf," "Borg"
and "HAL."
- Line-of-sight terms: A lot of people
think they're being clever by using a term
that's right in front of their face as they sit
down at the computer--i.e., they use the word
"Sony" because that's the brand of their
monitor, or "spider plant" because one's hanging
right overhead. But all you're doing is
providing contextual clues that others could
pick up. To play it safe, avoid any reference to
common objects found in households and offices.
- Common phrases: Avoid especially
those pertaining to greeting or getting down to
work, such as "Good morning," "Wake up, "Hey
you" or "Get going."
- If you have both a login identity and a
password, keep in mind that it's relatively
easy for other people to get your login--it's
right there in the email you send, or in a
directory of who's online. Don't let your login
provide a clue to the password! If your email
address is "HueyDewey@aol.com," don't make your
password "andlouie."
- In a nutshell: reach for personal, not
public significance.
Pick a winner
It helps if the end result isn't a word found in
the dictionary (see Tips). Some examples:
- Bad choice: the name of the street
where you live (Evergreen).
- Good choice: the name of the street
where you lived when you were seven
(Placer).
- Better choice: the name of the street
two blocks over, where your best friend Bobby
lived when you were both seven (Blue Gum
Avenue).
- Best choice: the same street rendered
into a non-dictionary term (bluegumave).
Preserve the password
No matter how strong your memory--or how
memorable your password--there's too much at stake
to trust your recollection. Once decided upon and
duly entered, the password should be written down
in a safe but unobtrusive place.
This can pose a problem. You might find it
easier to remember a password than a set of
directions to a secreted piece of paper, and
besides, you're relying on the same memory to
retain both pieces of information. That's why both
password and hiding place are usually products of
personality and force of habit, and why most
would-be security crackers employ psychology as
well as computer expertise.
- Here's a trick that often works: hide
the access code in a place that's not hard to
find, but in a form or context that makes it all
but impossible to identify as the password. For
example: let's say your password is
"123Buttercup." You could place an entry in your
address book listing a Ms. Morgenstern at 123
Buttercup Lane. Most prying persons won't know
that Morgenstern was the name of your Computer
Science teacher back in high school.
Know when to change it
Don't get too attached to your password; be
prepared to abandon it in favor of a new one when
the need arises. And learn to acknowledge that the
need has arisen. Too many people cling to a
password either out of sheer force of habit, or
because they never learned the procedures for
changing it.
- When does the need for a new password
arise? Don't wait until someone sniffs out
the old one--that's a little like locking the
barn door after the cows are gone. If you have a
situation where more than one person has had
access to a password, follow this policy: change
it whenever someone who knows it no longer needs
to use it. Even if that person is completely
trustworthy, and even if changing is a hassle.
- Why? It's not a sign of mistrust, but
a courtesy to the departing. You free them from
the burden of having to keep a secret (since the
old password is nothing but trivia), and you
eliminate even the shadow of suspicion in case
unauthorized access does occur.
Build a mental key chain
Modern life can present a maze of demands for a
password, and the easy temptation is to make one
keyword fit all. But the dangers of that are clear:
you're maximizing your vulnerability if someone
cracks your password. Why make it any easier for
them? Or let's say you're sick at home one day and
a co-worker needs access to a work file. You might
feel better about giving them the password if it
doesn't also unlock your bank balance and that
encrypted folder of old love letters.
- If you go through random approaches for
each new password, you've increased your
opportunities to forget or misplace it. So the
best solution is to build a "mental key chain"
of passwords: a thematically-linked series that
you apply to multiple uses. From time to time,
you may forget which password goes to which
machine, but all that means is that you'll have
to try another.
- To build a key chain, recognize
natural linkages (while steering away, as usual,
from the obvious). For example, let's return to
when you were seven and your best friend lived
two blocks over. If you limit your associations
to you memory of that time, you can come up with
links that are vivid to you but incomprehensible
to others.
- Your homeroom teacher's name.
- The subject he or she taught.
- Your grade in that subject.
- The color of the shirt you wore when the
class photo was taken.
Into all of these you might make a habit of
inserting the number 7, (or another single
digit) for three reasons: to remind you of
which age to recall, to identify the passwords as
part of this chain, and to render them
non-dictionary words.
Examples of the above: John7son,
read7ing, read7b, white7pic.
-end-

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