Why Computer Password Should Be Complex?Importance Of Computer Password.
کمپیو ٹر کے لیے پاس ورڈ کیو ں ضرو ری ہے اور کمپیو ٹر پر پاس ورڈ کی کیا اہمیت ہے۔
Passwords are principal device for restricting access to
a machine or network. However, passwords can be guessed or stolen. To guard
against theft or discovery, password should be changed frequently. Operating
System (OS) is enforced a password changing policy upon its users. To counter
guessing, quite simply, the password needs to be made as long and as complex as
possible.
A single letter password chosen from (a-z) might be
guessed after 26 attempts. A two letter password has 26 times more
possibilities (676). The following table shows this sequence of increasing
complexity.
1 - Letter password – 26 – possibilities
2 – Letter password – 676 – possibilities
4 – Letter password – 456976 – possibilities
8 – Letter password – 208827064576 – possibilities
Windows OS permits password of up to 127 characters, but
recommends at least 8 character for a password.
A single letter password chosen from a to a gives a base
of 26 elements, but if the choice of elements includes upper-case letters and
other symbols, thus the complexity level will increased significantly, and the
password integrity is strengthened.
The length and composition of a user’s password can be
specified in security policy, either for an individual machine or for a domain.
In summary, for a password to be strong and difficult to
crack, it should:
1-
Be at least 8 characters long
2-
Be significantly different
form your previous password.
3-
Not contain your own name or
user name. ( nor the name of spouse, children, pets etc)
4-
Not be a common word or name.
5-
Have at least one digit and
one upper or lower case letter.
NOTE:
Any password should be changed after every 6 months.
