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Creating Strong Passwords Cheat Sheet by

security     password     strength

Introd­uction

Passwords provide the first line of defense against unauth­orized access to your computer. The stronger your password, the more protected your computer will be from hackers and malicious software. You should make sure you have strong passwords for all accounts on your computer. If you're using a corporate network, your network admini­strator might require you to use a strong password.

What makes a password strong (or weak)?

A strong password:

Is at least eight characters long.
Does not contain your user name, real name, or company name.
Does not contain a complete word.
Is signif­icantly different from previous passwords.
Contains characters from each of the following four catego­ries:

Category

Char­acter Category
Exam­ple
Uppercase letters
A, B, C
Lowercase letters
a, b, c
Numbers
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
Symbols found on the keyboard (all keyboard characters not defined as letters or numerals) and spaces
` ~ ! @ # $ % ^ & * ( ) _ - + = { } [ ] \ | : ; " ' < > , . ? /
 

Password Strength

Creating the Password

A password might meet all the criteria above and still be a weak password. For example, Hello2U! meets all the criteria for a strong password listed above, but is still weak because it contains a complete word. H3ll0 2 U! is a stronger altern­ative because it replaces some of the letters in the complete word with numbers and also includes spaces.

Help yourself remember your strong password by following these tips:

Create an acronym from an easy-t­o-r­emember piece of inform­ation. For example, pick a phrase that is meaningful to you, such as My son's birthday is 12 December, 2004. Using that phrase as your guide, you might use Msbi12­/Dec,4 for your password.

Substitute numbers, symbols, and misspe­llings for letters or words in an easy-t­o-r­emember phrase. For example, My son's birthday is 12 December, 2004 could become Mi$un's Brthd8iz 12124 (it's OK to use spaces in your password).

Relate your password to a favorite hobby or sport. For example, I love to play badminton could become ILuv2P­lay­B@d­m1n­t()n.

If you feel you must write down your password in order to remember it, make sure you don't label it as your password, and keep it in a safe place.

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