If you have a wireless network at your office, please take a moment to read this entire article so you are assured that your wireless passphrase is secure. After reading this article, you determine that your passphrase is not secure enough, please call your I.T. provider or Quality Computer Services to secure it.
When we set up our wireless networks, most of us use passwords that include words. As such, those passwords are vulnerable to dictionary-based attacks. The number of words in conversational English is in the tens of thousands. If the passphrase is insecure, a computer with moderate power can break into most wireless networks with two full days of solid brute force attacking.
Ideally, you should avoid the following if you are trying to make your network more secure:
- Avoid words from the dictionary.
- Avoid words with numbers appended at the end.
- Avoid double words or simple letter substitution.
- Avoid common sequences from your keyboard.
- Avoid common numerical sequences.
- Avoid anything personally related, such as your license plate, social security number, past telephone number, birthday, and so on.
Besides using a unique SSID, a wireless network passphrase should follow the following rules:
- Fully random
- At least eight characters in length.
- Contain at least one upper-case letter
- Contain at least one lower-case letter
- Contain at least one special character, such as @ or !
- Contain at least one number
Following those suggestions, your wireless network should become more secure and more difficult for the determined individual to gain access to your resources.