Your router is already setup securely with a password and network name that is unique to every device.
However you can choose alternative settings for these features if desired.
From this page, you can configure your WiFi Network Name (SSID) and the WiFi security settings.

Enable Wireless
SSID:
   
Select Wreless Security level:
None          WEP          WPA
Network Authentication:

WPA2 Preauthentication:
Network Re-auth Interval:
WPA Pre-Shared Key:    Click here to display
WPA Group Rekey Interval:
RADIUS Server IP Address:
RADIUS Port:
RADIUS Key:
WPA Encryption:
WEP Encryption:
Encryption Strength:
Current Network Key:
Network Key 1:
Network Key 2:
Network Key 3:
Network Key 4:
Enter 13 ASCII characters or 26 hexadecimal digits for 128-bit encryption keys
Enter 5 ASCII characters or 10 hexadecimal digits for 64-bit encryption keys