Building a strong password is a must do thing these days. Windows once stored passwords as plain text in a hidden file. Forget your password? You could just delete the hidden file, and the password was erased.
Early on, Microsoft and Adobe both used passwords to mean that a file was password protected when opened with their applications. If you opened it with another application, such as Notepad, the password wasn't necessary.
Microsoft Access 2.0 databases could be opened as a text file easily by just renaming them with a “.txt” extension. Doing this allowed you to see the database data. Adobe PDF files in versions 4.0 and older were printable and often viewable using Linux PDF readers or Ghostview for Windows.
Wireless networks have a problem with encryption as the key for the encryption can be guessed once you collect enough encrypted data out of the air to find the patterns and guess the keys. With todays computing power in the normal home, the key can be cracked almost immediately to find the password.
Bluetooth security is considered very secure, once it is setup. The problem is that Bluetooth transmits a unique, freshly generated, password between the devices to establish the connection and the password is sent as plain text. If that password is intercepted, all future transmissions for that session can be easily decoded.
Choosing a Strong & Best Password
The best passwords,
1. Cannot be found in a dictionary.
2. Contain numbers, letters and those odd swear symbols on top of the numbers.
3. Contain upper and lower case letters.
4. The longer the “stronger”.
With a 2 letter password, and 26 letters in the alphabet, plus 10 numbers (ignoring symbols), there are 236 possible combinations (687,000,000 possibilities). Increase the password length to 8 characters, and there are 836 combinations (324,000,000,000,000,000,000,000,000,000,000 possibilities).
There are many password generators available on the internet, but these will generate a nearly impossible to remember password.
Try instead to use a seemingly random string of letters or numbers that you can easily recall.
gandt3b! (goldilocks and the 3 bears!)
JJPL2c1d (john, jill, paul, lucy, 2 cats, 1 d – the members of your household)
You may try creating strong passwords using several online password creation tools and stay safe while computing online as well as offline.
Source: Hacker High School-Security awareness for teens