Warning:I am not responsible for anything. (like if you mess up your router).Never hack or use someone's wifi without their permision as it is illegal.
This instructable will teach you how to secure your wifi and hack it
Step 1: How to Secure It
You also need tools:
My wifizone (free)
Network magic (costs money so dont recommend it)
Step 2: Using My Wifi Zone
To get your ip adress:
On your computer if youre using xp go to start then click run and type in cmd.
This will bring up command prompt and type in ipconfig/all
Look for your router/modem/wlam card/network card and look for physical adress
Now write the adress down and go back to my wifi zone. Click on the white list tab and add your mac adress and if you want to put in your ip type it in (but you dont have to).If you dont put in a ip it will say invalid ip then just type in a random ip and click add now remove the ip.After you added it click apply.
Step 3: Hacking Wifi
cow patty (free)
cow patty uses a dictionary attack (weak passwords) to hack wifi passwords
wirelesskey view (free)
nirsoft has all kind of free softwares for passwords and stuff
Tor helps with privacy
mad macs (free)
mad macs is a mac adress randomizer
Step 4: The Rest
If you know of other good software for hacking wifi or to secure it please tell me in your comment