Selecting Good Passwords

The object when choosing a password is to make it as difficult as possible for a cracker to make educated guesses about what you’ve chosen. This leaves him no alternative but a brute-force search, trying every possible combination of letters, numbers, and punctuation. A search of this sort, even conducted on a machine that could try one million passwords per second (most machines can try less than one hundred per second), would require, on the average, over one hundred years to complete. (http://www.alw.nih.gov/Security/Docs/passwd.html) You can also find online password generators, such as this one (http://www.winguides.com/security/password.php)

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