Canon EOS-1D X Mark III DSLR Camera (Body Only) - Manual (Page 579)

Setting the access point authentication method
3.
Select the authentication method.
Select an option and then [ OK ] to go to the next screen.
On the [ Encryption settings ] screen displayed if [ Open system ] is
selected, select [ Disable ] or [ WEP ].
Entering the access point encryption key
Enter the encryption key (password) set on the access point. For details on the
encryption key that has been set, refer to the access point's user manual.
The screens displayed in steps 4–5 vary depending on the authentication and
encryption set on the access point.
Go to
Setting the IP Address if the [ IP address set. ] screen is displayed instead of the
screens shown for steps 4–5.
4.
Select a key index.
The [ Key index ] screen is displayed if you have selected [ Shared Key ]
or [ WEP ] in step 3.
Select the key index number set on the access point.
Select [ OK ].
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