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IEEE 802.11g
This is another wireless LAN standard set by the 802 working group
that establishes LAN technology standards at the IEEE (Institute of
Electrical and Electronics Engineers) of the United States, and is
compatible with IEEE 802.11b. It also uses the 2.4 GHz band, but
enables communications at a maximum speed of 54 Mbps.
Infrastructure Communications
“Infrastructure Communications” refers to networks using wireless
LAN access points.
This function can be used to connect to the Internet or a wired LAN
via a wireless LAN access point. Wireless LAN access points include
wireless broadband routers.
Ad-hoc Communications
Signal transfer through wireless interconnection of computers is referred
to as “ad hoc communications”. With such ad hoc communications
there is no connection to the Internet. Ad hoc communications are
suited for establishing simple temporary networks.
The value indicated above is the maximum theoretical value for the
wireless LAN standard, and does not indicate the actual data transfer
rate.
Network Names (SSID: Security Set Identifier)
When forming wireless LAN networks, groups are formed to prevent
interference, data theft, etc. This grouping is done by “SSID” or
“Security Set Identifiers”. For further security, a WEP key is set and
signal transfer is not possible unless the SSID and WEP key match.
WEP Key (Network Key)
This is key information used for encrypting data when conducting data
transfer. On the S-32, the same WEP key is used for data encryption
and decryption, so the same WEP key must be set on both devices in
order for communications to be established between them.
WPA (Wi-Fi Protected Access)
This is a security standard established by the Wi-Fi Alliance. In addition
to the conventional SSID (network name) and WEP key (network key),
it also uses a user identification function and encrypting protocol for
stronger security.
WPA2 (Wi-Fi Protected Access 2)
This is a new version of the WPA established by the Wi-Fi Alliance,
compatible with more secure AES encryption.
WPA-PSK/WPA2-PSK (Pre-shared Key)
This is a simple authentication system for mutual authentication when
a preset character string matches on the wireless LAN access point
and client.
Passphrase
This refers to the code key used for WPA-PSK/WPA2-PSK authentication,
a WPA authentication method.
TKIP (Temporal Key Integrity Protocol)
This is a network key used for WPA. The encryption algorithm is RC4,
the same as for WEP, but the security level is increased by changing
the network key used for encryption for each packet.
AES (Advanced Encryption Standard)
This is a next generation standard encryption method replacing the
current DES and 3DES, and because of its high security it is expected to
be applied widely to wireless LANs in the future. It uses the “Rijndael”
algorithm developed by two Belgian cryptographers to divide the data
into blocks of fixed lengths and encrypt each block. It supports data
lengths of 128, 192 and 256 bits and key lengths of 128, 192 and 256
bits as well, offering extremely high encryption security.
Information