MSI RG70A - Wireless-N 2T2R Broadband Router User Manual page 46

Authentication Type: There are two authentication types: "Open System" and
Key Length: You can select the WEP key length for encryption, 64-bit or 128-bit.
The larger the key will be the higher level of security is used, but
the throughput will be lower.
Key Type: You may select ASCII Characters (alphanumeric format) or
Hexadecimal Digits (in the "A-F", "a-f" and "0-9" range) to be the
WEP Key.
"Shared Key". When you select "Open System",
wireless stations can associate with this wireless router
without WEP encryption. When you select "Shared Key",
you should also setup a WEP key in the "Encryption"
page. After this has been done, make sure the wireless
clients that you want to connect to the device are also
setup with the same encryption key.
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